I'm still using old, long-out-of-production Apple Extremes for basic routing needs and remote WiFi control not involving a lot of distance. They always work, have a good range, and their form factor is durable and reliable (no broken or disconnected antennae). Several years ago, I "stocked up" on Apple Extremes, buying 5 of them for around $25 apiece, thinking they would stop working along the way. I still have all 5 and they are all in service.
Having said that, I have a good friend that's an outstanding audio guy and corporate IT guy that has built an insane WiFi router package from Ubiquiti units and parts. There's 2 pieces involved and I've seen him walk a local football stadium with no loss or dropouts with this rig. This is a nice-size stadium with 45,000 seats. I'm having him build me a scaled-down version of this rig and I hope to have it in a week or so. It will cost around $400, but for some system-tech work I have coming up this year with a JBL VTX?Crown iTech rig (so much for retiring from pro audio soon), I need to step up my remote control game.
I'll post some pics when I get this rig, if anyone is interested. It's waaaaaay overkill for most remote control rigs, but it will be really cool.....