Lifetime Fitness is an awesome gym. I've been a member since 2005. They have everything there (tennis courts, indoor/outdoor pool, cafe, classes, etc.).
The classes are awesome and they have many different options depending on your fitness level. If you want a great workout take James' classes. He's awesome!
The only (and there's only one!) complaint I would have which makes me not give this gym 5 stars is the cleanliness in the gym classes. I don't know how often they sweep/mop but there are always (yes, always!) pieces of hair laying on the wooden gym floors. It is pretty gross! There are so many people in those classes everyday I think they need to have someone sweep EVERY day.
Other than the dirty floors in the gym classes this is a GREAT gym and I'd definitely recommend it. It's worth the $50+ a month if you like being active and staying in shape.
-Also, Lawrence Schlett is an amazing trainer there too.