Rick Pierce has done a lot of testing with onboard chargers and feels this is the best one available. Even he will tell you that there is a better solution to an onboard charging system and that is with a Lester carry charger. However, the majority of consumers have accepted the fact that onboard chargers are a necessity. Why, I dont know. Maybe convenience. Ive had at least a handful of Pro Pak chargers over the years and have only had one issue. Called Rick Stanfield at Pro Pac and had another sitting at the door by weeks end. Fact is there is not one charger, charging system that is 100%, but Pro Pac is a good charger and has excellent customer service.