I have one, I like it. It controls my lights via Phillips Hue bulbs, my thermostat (Honeywell brand, forget which model but its wifi enabled), I use it with prime music, its good for adding things to a shopping list when you're in the middle of cooking or washing dishes or something and you suddenly remember you need something but you don't want to stop what you're doing and go find a pen/paper. That's pretty much what I use it for at this point, but I plan to add home security system/garage door functionality. I'm waiting to do more until I relocate in a few months.
Worth the money to me, but I don't know much about Google home to say if its worth waiting for.