Love these, the base is fantastic even if you lose a plastic ear thing, I go through so many pairs of headphones a year so to get them in bulk like this is amazing We purchased the rubber mat as well to protect the roof and aid in non slippage of the carrier. I was prepared for a significant worsening of quality and the minimal step off is more than acceptable. Unfortunately this product does not perform. I buy these for my little guy every year because they are the best sandals for boys. I prefer velcro that attaches to the side of shoe not comes back across and attaches to itself. Looking through the manual I decided this product was worth a shot considering its flexibility and AI features. Worked great I run inserts for my flat feet and boy are these comfortable I walk about 20 miles a week and they hold up for a good 3 months or so. I created a custom recording booth lined with sound proofing tiles and a cover, still heard all the noise.