I really like the Crux for a few reasons.
1. Convenient class times. I've taken a beginner's class here as has my boyfriend. It seems they really cater to people looking to get out there and try it.
2. It's tall. And when I say tall, I mean 72 ft high. This is great if you want to work on your climbing endurance. If you're a newbie, I don't suggest climbing all the way to the top every time - especially if there are only two of you climbing. You'll get really tired - really fast.
The gym is really "no frills," and I mean REALLY. You won't find anything fancy here. Guaranteed. But, if you don't care and just want to climb, I recommend it.