Using a sleeve for length gains

Anyone here have experience using a sleeve to improve length gain with a pump?

So I have been experimenting with the penis sleeves from Zenhanger. Com for a month now. They come in standard soft (best for anti turtling) and super soft (best for pumping).

It is hard to quantify the effects of the super soft sleeve for pumping, but the other sleeve I use I realized can be worn as an all day super light extender. So I will pump (avoiding excess edema) then throw it on and can comfortably wear it for upwards of twelve hours, all the while getting a light but noticeable stretch. It seems to be improving my my flaccid hang. Message me if you need any more details.