My experience with the AirPort Extreme has been terrible to say the least. Over the years I have gone through 4 of them due to some poor design with the hardware. Usually is was the fan failing which caused a massive slowdown to the point where it's not usable. I took it into the Apple Store, they couldn't find the problem, I made a big stink and they gave me a new one. That one survived for another 6 months and failed in the same way.

I switched to Ubiquiti and won't look back. It's cheaper, enterprise grade hardware. If you know anything about networking, setting up the environment isn't that big of a deal, but is definitely a deterrent for some.