Inexpensive No-Installation Pull-up Bar

A few days ago I mentioned a DIY pull-up bar as an alternative for more expensive models. I just ran across an inexpensive off-the-shelf model though, that looks almost exactly like the one I own. The only differences appear to be that mine was by Champ's and this one is by Everlast. Also, mine had red pads and this one has black. Otherwise I'd say they are identical (from looking at the pictures, at least). Read the user reviews, as they raise the following potential issues: cheap construction (mine has lasted great), possible marring of surface just above the door due to scraping (yes, I get a bit of this), marring of door trim surface due to color rubbing off the black padding (haven't noticed this with my red pads), and door sizing issues (description says, "fits most doorways up to 32 inches"). $25 is quite a price though.