I have the Curve, a cb 3000 and the CS 100 (purchased in that order).
I do like the belt and affixation system of the CS 100 (and the whole steel thing!) and I am thinking of adding the security bow to it. The only drawback I find with the CS 100 is that urine tends not to flow out freely so it can get stinky, and it is not easy to clean. I am thinking of upgrading to the CS 500/A which has a metal tube until the head of the penis, and then an open, barred end (here's the site http://www.fetish-felix.com/).
I am wondering if anyone has tried this model and has views on its comfort etc? I am a little concerned that there might be problems with flesh being squeezed out through the bars when aroused. I suppose it is a little like the Jailbird or Watchful Mistress, which seem popular.
m_gameboy