Supra posted somewhere that the guy really wants to promote the foreskin restoration bit and its not his agenda to be pushing it for length gains, which is why he kept the estimation kind of purposely low. As an ADS it should perform just as well as others, and with its apparent comfort factor i would guess it would even outperform many ADS's out there.
Just my thoughts, i do not have one myself yet.
tape would get messy i think, consider it would be warmed over a period of time while being potentially stretched too.
someone posted an alternative if you are having diffs keeping it on. he added a piece of cardboard on top of the foreskin and through the tugger hole. this ensured a very snug fit and plenty of pressure to keep the vtlc on.