construction is ok I guess, they don't use DOM tubing, they use a leser quality hrew. also as mentioned, the material is pretty thin, I think it specs out to about 16-18 ga which is what stock fenders are roughly. My biggest gripe is $$$
I built my own tube fenders and did it for almost next to nothing. If you can and have a welder, I suggest White Rhino Fab DYI fender kit. It will require trimming and grinding to get the primo fit, but IMHO it is one of the better kits out there and costs considerably less than the smitty built.