I bought this bike which I loved the bike except for two flaws. As you ride the bike it slides so you have to keep adjusting it. To solve this problem put a rubber mat underneath. Next big issue is when it comes time to change the batteries. Watch out you practically have to turn the bike upside down to change them then the cheap plastic clips on the compartment will break. Now the only thing to hold the batteries in so you can work the bike is lots and lots of duct tape unless you want to buy the adapter which honestly should have come with the bike for free.