Looking for Recommendations: What Pet Camera Do You Use to Check on Your Cats?

I've been thinking of getting a pet camera so I can check on my cats when I'm away but there are so many alternatives it's hard to tell what's actually worth buying Some have two way audio, treat dispensers, motion alarms and all sorts of other functions.

What is your pet camera and what do you like (or not like) about it? Mostly I want something with a decent picture and dependable notifications when my cats are up to their typical mischief. Would love to learn what has worked for other cat owners.