I'm a student at UCLA and I train there every now-and-then (I regularly train at HBJJ). Tim's a great instructor and a good friend.
The classes on Tuesday and Thursday are part of the UCLA curriculum, however they have open training on the weekends. Tim will be graduating soon, so I don't know who will take over. There are a lot of white belts, about a dozen blue belts (some of which are monsters on the mat) and a handful of purple belts. I usually show up once every 4 months or so and they greet me with open arms. Really good group of people. Tim tries to get higher belts from Wander's to give seminars every so often.
One reason why I don't train there often is because it can get really crowded. It usually dies down after a few weeks, but there's no ventilation, it's on the top floor, and it can get really swampy in there. And since the alloted time is only and hour and a half, it's difficult to get a good session in.
As someone pointed out, the room is open to all martial arts classes as well as the general public, so there's heavy traffic on the mats. They clean them every morning, but the BJJ classes are usually the last ones of the night, and I've seen countless number of people walk on the mats with their shoes. Plus, you can tell some of the students don't wash their gi very often (probably because laundry in the dorms is such a pain in the ass), and it can be quite uncomfortable rolling with them.
With that said, if you don't have transportation to an academy, or you're low on funds, it's a great place to train.
