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Raymond P. Much nicer to use with pump, only problem is gets sucked into the pump. Base is much smaller than other models. I have 2" wide base and ordered (S) 2-2.25" and base is just too thin. Good for masturbator only.
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Anthony W. The silicone is soft and pliable as expected. The silicone around the outer edge that mates against the vacuum jar should be made of a stiffer material so that it will not collapse and be drawn into the vacuum jar. The length of the silicone is perfect, along with its ridged passageway.
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Kevin D. First use. Sleeve so stretchy that it clogged the vaccum port and burned up my 200 dollar pump