For variety-sake, I own the 1", 2", and 3" versions, with the 3" extension being a bit too much for her as a **** extension, and has been re-purposed as a glass ***** cover. These fit very well and do not slip off, even with vigorous use. Low-odor material is a welcome change. Overall, quality is as good, or better than any other I have tried. However, my 2" version appeared to have a defect. I experienced an almost perfectly linear split, about 59-60% down the shaft of this extension. My others have been perfectly fine. Being a *** toy product, I was doubtful that the manufacturer would replace the apparently defective unit. I have not contacted them, so I cannot confirm if they might honor a replacement, or not. I would like to think so...as these are not inexpensive extension. I would still recommend this brand, as they have been the best I have used. Even though my wife continues to say she prefers me au natural, her body says she enjoys the occasional extension experience!