Best Mesh WiFi System

Don't care about best. I've been using Tp-Link Deco M5 1300 for about 5 years. Started with four for ~$200 and added 2 more refurbished for $80 to put one out in the shed. The ones in the basement, upstairs office, main floor back hifi and outdoor shed all have Ethernet connections. The fifth is rock solid wifi to the front doorbell cam and the sixth is a spare.
We have WiFi calling and it is solid everywhere.

So far 4 different systems.
Best value?
Depends on how good a shopper you are.
Best coverage?
Good luck finding anyone here that has compared.
Best form form factor?
Only you know what you like.
All you know for sure is that everyone is happy.
Go for it.