I have had my Steelwerks Extreme custom chastity device for less than a week, but I think it may be perfect device (for me at least). There are many small details that make a device work for you that you can achieve in a custom device that I just couldn't find in anything off-the-shelf. I designed my device to be very compact (erections are forced back into the body cavity). It has an "entry ring" to the cap which provides additional security and comfort. It is secured with a locking Princes wand and it has good ventilation for easy cleaning. I'm very impressed with the unbelievable craftsmanship, it fits great and is incredibly lightweight and secure. I will provide an update when I've worn it longer.