I have glass shelves with a plastic curved edge in front. Also the vibration feedback is a little stronger than the Pro Controller. Arrived a couple days late but it?s okay, for really nicely love them I let it run for a few hours but not wearing it. It was time for an upgrade from the pile of shoes on the ground. Unfortunately, I am not able to properly rate the shampoo because I received two conditioners and I didn?t actually pay attention to this until I got ready to wash my hair tonight. Overall I cannot recommend these enough so far. Great shoe I highly recommend! The initial assembly was a little slow, but I think now that I understand how they went together and that I shouldnt have to completely disassemble to move around or remove altogether, things should be pretty quick and easy going forward. Second time purchasing this product.