Having been to this place several times, it is easy to report that I enjoy it. Not only is the manager/owner, Kelvin, very efficient and accommodating but the place is one of the cleanest and well appointed in Bangkok.
The boys offer quite a variety including everything from twink to muscle men. One of the muscle guys has the largest appendage, in circumference, I have encountered. Only about 5 or 6 inches but it could pass for a fire plug. Depending on the hour that you go you can surely find what you desire. After 5 PM is best. Fees are 700 baht for the massage room and 1000 baht tip for the boy minimum.
If you have any questions just ask me.