The Eau Claire Y is my favorite gym. You can read all about the facility on their website, but here's what I consider the highlights (and very limited lowlights):
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equipment in great shape;
CLEAN;
huge locker rooms and showers- (tons of room even during the after work rush, full size lockers, always super clean)- so I haven't been tempted to pay more for the super fancy executive locker room (but if it's like the executive bathroom on the simpsons, maybe it's worth it!);
diverse clientele, inclusive atmosphere;
friendly, helpful staff;
lots of exercise programs if that's your thing;
affordable (especially with a student card)
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Just one- parking in Eau Claire is expensive. During the day the Eau Claire shopping centre is the cheapest, I think. The surrounding street is $4 per hour by parkplus until it's free after 6.