Yes. I actually like it - but most people I've talked to don't want to manage email that way. I eventually switched away myself due to lack of support for other email providers & unified inbox.
It really baffles me how bad the GMail app on iOS is. I was hoping that Inbox would be a step up, but like you said, I don't want my email managed that way.
I have a work Google apps account and a vanilla Gmail account and it is frusturating not having a unified inbox. And I keep getting "Network errors" with it (on two devices that I tried).
I recently dumped the GMail app for Outlook on iOS and it has just been phenomenal. I wish the search was a little better and I could see my GMail labels, but for now, it looks like I won't be going back.
At least you have a gmail app. I'm on windows phone, aka the platform that google shuns completely and utterly (to the point of taking apps out of the market when they buy a company that has a windows phone app). I used to do everything in google's ecosystem because they were OS agnostic, but now they just want to lock me into android and chromebook. Thanks but no thanks. Microsoft has been forced to get it, their stuff works great on all platforms.
Inbox is this really cool thing that doesn't work for anyone. It's awesome for categorizing transactional emails, but misses the mark for person-to-person communication.
If you use one email address sole for transactions, and one for personal emails, Inbox is actually pretty awesome. I don't know many people who do this though.