Sadly, neither of the shelves could hold the weight of the 13 books without bowing in the middle. The software is so buggy, it keeps crashing every few hours. The sensor is good though, I havent had any issues with that, twitch flicks in games feel just fine but Im no expert. The smart phone application make managing the system a breeze anywhere in the world. So Im keeping the shoes, and like Cinderellas prince. Worth the extra $$ if you have similar fit issues. I love the look so much I am contemplating getting one half size bigger and putting in a better foot bed. But all in all thats ok, because it looked as if I wanted it to be loose. The only advantage airpods have over these is the ability to pair easily with multiple devices. Unfortunately the sunshade hits on the neck of the bike making it more difficult to open.