Stimulating but has weakness
Look at the cross-section of the product. Do you see how the canal bends twice? Half of it seems to bend downwards, and the other half upwards. It creates at least one weak point (though I suspect two, given that there are two sharp "corners" in the canal). What happens is that the thickness between the outer layer and the inner wall at these sharp corners is not enough, causing wear-and-tear to occur faster in these zones. Mine has not developed a hole yet after 4 months but I can see the stretch marks and tears forming from the outside. On the question of how stimulating this product is, it is good and it does that job well. Reaching inside with a cleaning cloth is a bit harder due to the shape of the canal, but it's really not a big issue. No issues with smell.
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