This is a sturdy pull-up bar. One drawback is that the mounting brackets may be a bit too large for your particular door frame, at which point you will have to determine if you want to send it back or damage the door frame to install it. There are things that flip up from the bracket that kind of secure the bar into the bracket, which, depending on the size of your door jam, may not flip all the way open unless you take a chunk out of the wood. If they cannot flip all the way up, the bar will not go into the brackets. Damaging the wood is not a big deal if you own your home, but could definitely be a big deal if you are renting. Either way, you have to screw the mounting bracket into the door frame, which, if you are renting, may not be allowed anyway.
The other drawback is that once the bar is in the brackets it can be very hard to get it out of them. It is definitely secure in the brackets and really, the things that flip up from the brackets are totally useless because it is secure in the brackets whether those are flipped up or down. But, when you want to take the bar off the door, getting it out can be a pain.
That said, once the thing is on, it is sturdy. I have never felt like the bar was ever going to come out of the brackets or that the brackets were going to come loose from the door frame. So, if you can live with the drawbacks, this is definitely a good option, and much safer than some of the "no-install" pull-up bars.