I use two AirPort Extremes (one is actually a Time Capsule). I've never had an issues with it and my wi-fi performance is very good, Since I have a multiple Mac

I use two AirPort Extremes (one is actually a Time Capsule). I've never had an issues with it and my wi-fi performance is very good, Since I have a multiple Macs in my household, the automatic backups when connected to the network is very nice.