I'll start off by saying I've been several times, but haven't been there in the last year and a half or so. Last time I went they were located in a residential area. Three massage rooms in the downstairs of a large house. It's run by Rita and her younger sister, who's name I cannot recall, who has joined her within the last two years or so.
They are both cute, youngish, Thai girls. They don't seem to advertise in the usual places, so I'd say they rely primarily on repeat clientele. I've seen them both and they both provide a better than average massage. They are both small ladies, so if your looking for a hard massage you may want to look elsewhere. As for extra's I don't think anything is available with the younger sister, though I've heard rumors there may be options with Rita, as always ymmv(if anyone has some info and wants to keep it private my all means send a pm).
Guess that's about all I got.