I haven't installed the Powertrax unit that I recently acquired yet, but it looks like a good quality piece (1500 miles, so no wear). Haven't heard anything bad (yet). The previous owner had an issue with the housing and changed up to a 8.5" (mine's an 8.2"). He did say that he didn't like the clicking sound as he went around corners, but I don't know how loud it was. Guess I'll find out!