Once assembled, this is a very nice and sturdy heater. As others reported, though, the directions could use more detail. The most difficult step is #1 - attaching the wheels to the unit. In particular, attaching the "fixed mount" to the "wheel brackets" requires a fair amount of force to make everything come together. I was worried that I was going to cut myself against the sharp metal if the unit slipped during this step. Once I figured out this step, the rest of the assembly was straight forward and I'm pleased with how it turned out.