Hi Tess,
I joined Goldstar, and I have absolutely no complaints. As a kenpoist, I got to view the Planas tapes, without spending $50 bucks a set. They also have a set on stances and basics produced and narrated by Ed Parker.
The one week rental means that it is quite difficult to learn alot from scratch, but it may give you some different perspectives on what you already know. For me it is mostly a chance to see what is available out there, for example you can rent the IKCA vids from them if you were interested in the system.
I have had no problems with their administration, and communication has been pretty good.
I would recommend it.
Lamont