I have been locked up on and off for sometime, in the 2000, 3000, and the curve we have even used the Houdini. The 6000 is much more comfortable for longterm wear and tear on the body. I am a high and tight kind of guy and find that if I take a hot bath and pull the scrotum out from the body when it is warm and relaxed I can get a smaller ring on and there is no way I am gettting out of this compared to the old design rings. The one plus for now is no points yet which is nice. I highly recommend this if you are into chastity or are thinking of getting into it but be warned once you get into this one your not getting out until your key holder decides its time.