This fits okay on the rep nighthawk. It end up being a little taller than the bench and requires a pad to sit on. Leg extensions feel great for this being a plate loaded attachment. Curls definitely seem like an afterthought like most attachments and are not that great. The pads are comfortable enough and I can get a good stretch using the attachment. It is also very easy to move around and disassemble. I did not personally have to drill an additional hole for this to work.
My wife and I love using this. It fits quite well on the nighthawk. It is sturdy and the padding is good but not amazing. It is easy to adjust and gets the job done. The handle is also an amazing touch for getting in and out.
I love having these. I use them to easily attach a bar inside my landmine to my belt for belt squats. There are all sorts of other use cases. A great addition for variety in the gym.
For the price you will not beat it. I got the version that came with the low row/lat pulldown cables as well as dip bars, j hooks, and safeties. The pulldown is much more smooth than expected. The rack does move a little even with weight stored on each post, but I have never felt unsafe. I added stickers to make it easier to line up my safeties (not shown). This would be my recommendation for anyone looking for a budget starter rack.