I have used them for the past several weeks with lengthmaster, and bathmate.
Worked great with all of them, but, I have spoke with Lightning about possibility to make a longer Silicap, so it can cover the entire shaft, from the head to base, which would be great when pumping.
You will find in a pump environment, being able to manage more pressure with these on, minus all the shitty fluid retention, but, keeping the positives with pumping and using a bathmate such as increased circulation.
Using the lengthmaster, these are your wrap essentially when your attaching the hanger attachment to the sleeve for hanging, or stretching via that piece with for example bundled stretches.