I also have the Quik-Pak trailer. I have not used it yet but planning on taking it on my cross-country trip this May (DC to Seattle). I bought it after looking at the BOB and Nomad trailers carefully. It weighs 1 pound more than a BOB (using their website specs) and 2 pounds more than the Nomad. A poster above totals the BOB at 18 lbs. if you get the optional dry bag.

I can tell you the Quik-Pak is very well made and thought out. I like two wheels because you can balance the load over the axle which takes the weight off your bike wheel. It has two 20" touring-spoked wheels, adjustable axle height, and is completely waterproof. It comes with a visibility flag and reflective strips on the back. It also has more room than you would want to use (5500 cu. in.) but this just makes it easier to manage what you do bring in terms of packing your gear. It weighs 16.5 pounds.

It also folds up flat for shipping. It costs less than either the BOB or the Nomad and is made in Colorado.