Also coming from a 7, and yeah, it's real big. Kinda split on how I feel about it. On the one hand, it sure is nice, and the interactive gestures are surprisingly intuitive. On the other, it's tougher to use one handed, especially having small hands. I have to use reachability more, which isn't (yet) quite as easy as the double tap on home. Also there's just something about the comfortable snugness of a smaller screen, but maybe that's just me.
I came from an iPhone 8, one of the best phones I've ever used.
I moved to an XS, and its taking some getting used to but the actual footprint of the phone is the same as the entire 8, so I'm happy with it overall. I'm having to use reachability the odd time to get to the control centre, but other than that its ok.
The Max is too big, but that's just my opinion, maybe I just have small hands...