I bought the one from HF. The display model was pretty hashed by people messing with it. The actual product in the box I got was surprising- are you sure this is from Harbor Freight?
It was well built with the drawers firm and smooth. The casters were small and I was concerned about their ability to really roll and swivel well, but they had no issues. Most rolling seats have a tendency to tip over or stumble on a caster if I try to move laterally or towards the work area a bit, but this was very stable and had no issues.
I don't know what to put IN The drawers, and the flip down trays seem silly, but I haven't used it for any projects yet that I would use the features, so maybe I'll find a use. I think I'll add a couple of magnets to the side to hold loose bolts or such instead of the trays though.
As a rolling stool, it's pretty comfortable, stable, and not flimsy at all. Got it for $30 with coupon.