Mesh network products for work colleague - what works out of the box?

Friend at work has just got fibre connected, and now finds his wireless hasn't changed speed. More than likely crappy coverage/capped wifi speeds.

I don't think he'd be up for a Unifi type wired system, and that one of the off the shelf mesh solutions are probably the best best.

Ie Google wifi. https://www.geekzone.co.nz/forums.asp?forumid=66&topicid=217913&page_no=2

Now do these work as the entire network, ie the Google Wifi, I believe works best when it's the router and APs, but at launch didn't have the Vlan tagging for fibre (he's Slingshot if that makes a difference). Do any of the others?