I love it because I can only look at my pinned items and focus on knocking a few out at a time, and only occasionally flipping back to the regular inbox view. (Which I find distracting when I need to focus.)
[0] - http://blog.jedchristiansen.com/2014/12/02/the-super-magic-p...
I zip through my email in gmail using keybindings, se/e/! respectively with gmail set to go to next message automatically. Takes me a few seconds to go through about 20 emails, then I circle back to the ones I starred.
Inbox looks better, but feels a bit worse for me. Also, the no apps support as always is a downer, but us apps users are used to it.
I get a lot of sensitive information in my work email; if I forwarded it all to a second account where my employer couldn't enforce things like two-factor auth I'd be in a lot of trouble.
It doesn't sync with their previous star system, so you're unable to move back and forth on services when Inbox is buggy or vice versa. Inbox doesn't store any mail locally on mobile, so you're unable to search without an internet connection -- I am on the subway frequently and this is very problematic. With GMail, you have a one click delete system; with Inbox, you have two steps to permanently delete a message. This is cumbersome when you receive "a good amount of email", and you want to delete rather than archive.
It's a cleaner design, and the other features are nice incremental improvements, but the new features do not outweigh the benefits that the existing GMail app and service offers.
I often use gmail to send emails to my family and I just have a "Family" contact group setup in Gmail to do that (so in Gmail I just type "F" "a" "m" <tab> in the To: box and it's all setup). Most annoying aspect for me to using Gmail on Android and using Inbox in general, honestly.
Inbox is amazing for consuming incoming mail, and I'm hoping it will soon be able to consume Exchange.
I thought maybe +circles replaced that, but I can't even figure out how to send an email to a +circle.
Either I'm really dumb, or something obvious is missing.
I receive somewhere between 75 - 200 emails a day. I need to quickly scan over the email titles + bodies and just remove emails that are not necessary to respond to. Inbox doesn't really provide data as clearly. Though, if I wasn't receiving an email every few minutes Inbox does seem like a really awesome choice.
Plus, there's the huge risk that Google will kill this off in a year or so. Based on that history alone, all users should be reluctant to get on board with it.