only two shelves b/c not a lot of extra space. My wife is constantly taking her phone out of her case to charge and that is a bit annoying. you press the left click once but it registers it as two clicks on so many occasions. But sure enough the big kid 5 is too big and the big kid 4 is big but doable. The whole product is very well put together from the magnetic base charger (awesome), to the spare parts stored in the base station (Genius). Really I could be on the bike all day long I just have things to do but if I had a choice I would sit on that bike all day long! But, today I realized it was most definitely the shoes tearing at the back of my feet and I noticed a notable amount of blood on my heel, socks, and new white shoes. I wore them out however, and a few minutes into walking, I had cuts on my ankles. They are comfortable and sturdy. De plus, certaines formes de cadre ne sont pas évidentes à faire fitter (cadres plus larges).