I switched from Yahoo Mail to Gmail back in 2006 or 2007; it took awhile to come to grips with it, but I loved some of its conveniences and never switched back. I kept the old Yahoo Mail account as a backup just-in-case account, but I only check it every week or so. I'm always hesitant when trying new Google products. I didn't try Google's Wave product when it was introduced (and which died a relatively quick death). The company's offhand attitude and abandonment of its Google Reader users really set the warning flag. I don't plan on keeping any notes in Google Keep. And as for Google Play's takeover of my beloved Songza service -- well, I'm not holding out any hopes for that. Songza did exactly what I wanted from it and I'd have cheerfully paid them for the service. I simply don't trust Google to do anything I expect, even if I did pay them.

But I have been trying out Inbox by Google for a month or so and I'm liking it. Based on what I've read, Google really wants to push users to Inbox and I thought, well, let's try it. They may one day turn off Gmail and users will wake up with Inbox. So it makes sense to start coming to grips with it now.

What I Like

• Inbox's guiding philosophy is to view the email inbox as a to-do list. For any item in the Inbox, you must Do, Delete, or Defer. Viewing emails, newsletters, promotions, Facebook notifications, listserv digests, etc. as tasks has been a standard tenet of productivity literature since David Allen's first book. But while email clients helped me move emails around and write them or reply to them, they didn't really provide a framework to help me process them more quickly. Inbox, as I've been using it, is really helping me process (that is, delete or archive) emails in a more sane manner.
• Inbox groups emails into pre-defined bins like Promos, Updates, Purchases, and so on. Their groupings are pretty accurate and it's easy to move an email from one group to another. What I like best about the groups is that it's easy to scan them and delete them all in a single stroke; this bulk management of emails saves me a good deal of time.
• It's also easy to define my own group (in Gmail-speak, a label or tag).
• I love the feature that lets me create reminders to myself right there in the Inbox and then set them to appear at any date/time or to recur. In the past, I'd have used the FollowUpThen email reminder service (which I pay for) or SaneLater (which I stopped paying for) or Google Calendar or GQueues. (Geez, do I think I need a lot of help in my life or what?) Instead, the Reminders are quick and easy to set, they appear in my iPod's Google app and Notifications, and my inbox is clear of any emails I used to keep there as reminders.
• It's dead easy to snooze emails so I can deal with them later. Snoozing an email is like setting a reminder. It makes keeping a clean Inbox a breeze. Previously, I'd have forwarded the email to FollowUpThen and archived the original mail. Inbox's Snooze feature is much neater and more convenient.
• Inbox delivers the grouped email once a day -- 7am. So if I get any new Facebook notices or Promos or Updates, then Inbox holds them back from appearing till the next morning. I have found that rather authoritarian management of my email to be liberating. I'm one of those sad people who likes to check his inbox every 5 minutes. But knowing that these bulk emails are by default not urgent, and that they'll show up in tomorrow morning's email anyway, means my Inbox stays mostly empty. Personal emails from Liz or friends appear instantly and so I don't need to plow through other emails to get to them. So during the day, I'm more likely to receive only emails that will be of  immediate interest to me.
• (You can, of course, look inside Inbox's Social, Promos, Updates, etc. folders and see the emails that have arrived and that are being held for the next day. I prefer, in most cases, to let Inbox deliver them to me in a batch at 7am.)
• You can set three default snooze times for a reminder or an email; I use 7am, 2pm, and 7pm. When I open up Inbox in the evening -- BAM -- I'll see all the reminders and snoozed emails that I couldn't deal with earlier in the day. At this point, I deal with them by reading them, taking action, or deleting them. The Inbox becomes my to-do list -- which is the way I've always used it.

What I Wish Were Better

• Google's material design of Inbox looks nice in the browser, but the performance is not as snappy as in Gmail. Even on my Chromebook, Inbox is a visually stuttering application. However, using Inbox on my iPod is a treat and cements the idea for me that Inbox is optimized for mobile rather than the browser.
• Still haven't figured out how to filter an email so Inbox can automatically send it to the Trash. I still have to create those filters in Gmail. I also had saved searches in Gmail; the search facility in Inbox never seems to work as I expect.
• Some operations are simply easier in Gmail for me. I am taking part in an online course, so I'm receiving a ton of notifications throughout the day on new posts to the course's Facebook group. Processing 20 of these messages in Inbox just takes too many clicks. It's far quicker for me to zip into Gmail and process the emails rapid-fire.

I went all-in on Inbox over the Christmas break, avoided Gmail, and it was the best way to learn Inbox quickly. I also recommend reading Computerworld's JR Raphael's post on adopting Inbox. The second half of his post, where he talks about workflow, convinced me to give Inbox a try.

Today, I still access Gmail when I need to process a big batch of emails quickly. But Inbox rules the roost for the moment. Until Google says otherwise.

Update, January 11, 2017

I've gone back to using Gmail plain. Inbox's best feature was the scheduling function, but I have already duplicated that with FollowupThen. Inbox was just too slow, even when using it in Chrome on my iMac, even when using it on my flipping Chromebook. I often had to click on a mail two or three times for it to display as the clicks never seemed to register; Google's Material Design took so much time to load I got impatient. The only time Inbox performed at an acceptable speed was when I started using Kiwi for Gmail Lite; even so, I found myself flipping over to Gmail to process mails more quickly. Inbox by Google will have to offer much faster performance before I'm willing to switch again.