Very sturdy and one of the cheapest doorway pull up bars
Grips can rip after a few months, screw heads on bar above door can dig into wall, black rubber grips can leave marks on door trim
The cheapest leverage type doorway pull up bar, great so long as you don't mind wrapping with rags to protect your walls and doorframe
The ProSource Easy Gym Pull Up Bar is one of the cheapest doorframe leverage bars available.
It's very sturdy, in particular the main bar which unlike other similar bars is made of one solid piece of steel rather than two connecting pieces. The bar is certified for user weight up to 300lbs.
It has 5 grip positions with foam grips, which need to be treated carefully or they will tear. Like the other doorway leverage bars the ProSource can be used for not only pull ups and chin ups but push ups, sit ups and dips (though you won't get much distance on the dips).
The bar is 42" wide and fits doorways between 24" and 32", with a wall thickness of between 4.5" and 6", with at least 1" or trim depth above the door.
The two key downsides of this bar are the screw heads on the bar above door can dig into the wall and the black rubber grips can leave marks on the door trim. Both of these can be countered by wrapping the relevant areas in either foam or rags.