For the most part, I agree with Boatzo-- Items from Harbor Freight are almost always Chinese in origin and of variable (less than stellar) quality. I have purchased many things from my local HF store in the last 2 or 3 years, and consider MOST of them disposable. Some examples...
The 4x8 Folding utility trailer - No structural or mechanical problems with it (yet), but the bright red paint faded to a very weathered pink in less than a year. I imagine it's only a matter of time before seals start to fail and the frame starts to rust.
The $39 motorcycle chock mounted to the trailer was installed for less than a month, and the corrosion on the mounting hardware made it difficult to un-install. I could replace the bolts with quality stainless steel, and it would probably last forever.
It's worth mentioning that I used that trailer/chock combo to move my K-LT from North Carolina to north Florida without any real problems-- although I don't recommend the folding trailer. It flexes a LOT in corners, allowing the bike to lean a bit...
Some other examples of tools I purchased from HF:
The trigger-style furniture clamps tend to fall apart after 2 or 3 uses.
The cheap locking pliers ("vice grips") seemed like they'd do OK for household projects, but didn't hold up very well to major mechanical work.
The all-weather tarps work VERY well. Better than some 'commercial' quality tarps I've used. Definitely a good value.
The 900-watt generator has been virtually maintenance-free. It works well for about 7 hours at a time, as long as you don't mind the fact that it puts out 138 volts (instead of 120). Since most of the gear I run on it is self-regulating, I don't worry about it.
The 12" sliding compound mitre saw has completed two flooring projects (~400 sq ft total) without any major adjustments-- although the blade went dull fairly quickly against the laminate materials. Another good-value purchase for the handyman.
I have a 3-piece toolbox that came from HF, and it's held up pretty well for the last year.
I guess what I want to say is, I'd buy non-critical or one-time-use hardware from HF-- but if it's something I planned to use a lot or expected to last a long time, I'd go ahead and drop some cash on quality hardware.
How often do you plan to use the dolly?..