I have bought a 10-class pass at Quad and I am happy - and I usually dislike gyms. I told the staff, on my first class, I haven't spun in YEARS and my experience was mostly riding as a commuter. They were incredibly friendly, I even got some freebies on my first day, lots of help and attention setting up the bike.
I like their teachers and the musical selection is not that bad (well, for spinning classes). The showers could be better, but are good enough for a quick shower after exercise. I like that they rent spinning shoes for $3, I don't have to worry about buying an expensive thing I'd only wear there.
Overall, it's a great place, warm and welcoming staff, good teachers and plenty of classes.