I'll admit my home's layout is not ideal. The WAN drop from my ISP is on the ground level, and the house (interior townhouse unit) goes up for two more levels. I'd appreciate it, then, if the Deco app reflected the sometimes-spotty state of the mesh, and offered even the most basic feedback on how to make things easier for the network. Instead, TPLinkDeco offers either that "everything looks good," even when things are clearly not good from a network performance standpoint, or it offers that pretty much every Deco is offline, even when all the units have green status lights.
When it works, it all works well. Thankfully it works most of the time. When it doesn't work, however, TPLinkDeco is of no help whatsoever. I don't think I'm moving anytime soon, so I'll probably give Ubiquiti's mesh solutions a look at some point. Deco's is OK, but it demands more attention than I'd like, and TPLinkDeco is pretty much useless for troubleshooting.