Netgear Orbi is not a mesh system.
I can say that it works exceptionally well. For the first time ever since I have had an internet connection, and that is well before the internet if that makes sense, I am not getting connection failures with devices. I have a contented wife who no longer grumbles that her iPad has lost connection. Streaming to Apple TV or the BT box I have is no longer an issue, my Evohome Control Panel seems to connect and respond better. The Orbi consists of two units. One in my study upstairs connected to the internet and hard wired to my desktop and other controls, and the other in my lounge downstairs? I also now have a number of redundant extenders etc.plus a BT Home Hub 6 which I would not even give away - to the dustbin perhaps.