So I did finally got to use the Black Mamba XL extension with the wife.
Shape, material, texture: The pictures make it look like it has a mushroom head, but this is not the case. It is a tapered head with only a small ridge. My wife liked this because it made entry a little better. It is PVC, so do not expect anything close to cyberskin. It is still flexible, but also rigid. Kinda had the PVC smell for a couple days, but it went away.
Size: This thing is very thick, so your lady better be aware of what is up. I cannot get my hand around it. It is about 2.5 inches wide without me in it and 7 inches insert-able. It gets thicker with me in it.
Fit: I should have paid more attention to the reviews / dimensions before bought it. It is made for a cock that is average or smaller. I am 7 x 5.25 so from the start it was a tight fit. I was not even close to getting my balls through the ball strap. So I took matters into my own hands. Using some lube on the outside, I turned the extension, inside out and I was able to cut the hole deeper using a 1-1/4 paddle bit and a razor blade to smooth it out. I also cut away some of the ball strap to make it bigger. Now it fits pretty well, but is still a little small with some space between my body and the extension. Not a bad thing, because I like the look of the length. Even without the ball strap around my balls it will stay on my cock due to the tightness and the suction. Because it is soooo tight, it kinda makes your hardon go down a little.
Sensation (Me): The pleasure nubs inside are pretty nice. You have to use a ton of lube to get it on correctly. The first time we tried it, we just used it as a pleasure sleeve during a hand-job just to get used to it. I was impressed with it. When used vaginally, hardly any sensation is transferred through, but it is still fun.
Sensation (Her): I went ahead and applied lots of lube because I knew she would need it. We had warmed up with some fingering and regular intercourse to get warmed up. I was able to slide in pretty easily. Lets just say she REALLY liked being stretched by it, but I had to be careful not to go too deep. The hard texture of the extension hitting her cervix was not cool. I just made sure not to go more than 5 or 6 inches in and it worked great.
Even with the fit issues, I am glad to have it in our collection. Link below.
Amazon.com: XL Black Penis Enlarger Sheath: Health & Personal Care