Dont leave it with weight on it for very long or the seals may start leaking down. About the only thing that can go wrong. HF has a replacement one thats 5 tons and not 2 for around 50 bucks.I just purchased one, as they had a coupon to get it for $129.
Pulled a motor yesterday with it. Seems fine so far. Wheels don't pivot real easily, but for the price, I can deal with that.