I read the ALI site thoroughly. The problem I have is they only have one level of certification, which I assume is based on commercial, not consumer, use. The reason this is important it it means a consumer is likely over buying because the lift won't go through anywhere near as many cycles as it would in a commercial setting. It's a shame they don't have a consumer level of testing since people only using them for a hobby have no way of knowing the quality of a lift without paying a high price for a lift certified for commercial use.