I have heard some of the guys that race buggies and truggies complain about the hassle of changing batteries in a timely manner using the Losi 8 battery holders with the 3 velcro straps. I dont use straps for my batteries but I lay a strip of female velco in the bottom of the battery tray and use a strip of male velco on the bottom of the pack. It holds well for me and less work to change batteries. The only negative I have thought of is down the road the velcro might wear out but so far so good