Summary: The 055x is a very strong set of legs and will put up with plenty of abuse. They can be dunked in water or scraped on stone and still stay firm. The aluminium build makes them light but they still feel strong. My only complaints with the legs are that they have no spiked feet, the screws to fix the head could be fixed to the legs with retaining screws so they don't fall out from overuse and the levers are very stiff.
Pros: Aluminium build, Waterproof, High maximum weight capacity
Cons: No spiked feet, Head locking screws could fall out, Handles can be quite stiff to release