I've been using it for the last 3 weeks and it has been fine. I don't even have microG installed.
The only thing I really miss is Google Maps...
Yeah... OSM just doesn't cut it unless if you're in a city.
GMaps WV on f-droid is a self contained wrapper for Google maps. It works great!
Huh?!
GrapheneOS.org users disagree.
The cool thing about GrapheneOS in this regard is that it allows you to use Play Services if you want to, but you can limit it to a single profile and don't have to give it the special privileges it usually wants ("Play Services Sandboxing").