This place is excellent. I have worked out in the Miami and a NYC location as well, and this place has shot up high on my favorite gym list. These words are not to be taken lightly--I have been a fitness as well as (sports) medical professional up and down both coasts.
See also the tip I wrote.
The lockers are full-length. Bring a combo lock if you want to use a locker. I personally don't find it necessary since there are cubbies in the yoga room as well as plenty of space around you when you work out.
You don't need to pack much. There are cotton swabs, deodorant, mouthwash, hairspray, and towels there for your use. The showers are impeccable and spa-quality. A row of showers appear to have the rain shower head where the water falls on you directly from above.
A truly enjoyable place to work out and have down time from your day.