It did the job, but I wasn't particularly impressed with the ease of lining up and making a "clean" cut. It's seems like kind of a brute force technique, but the instructions do say you should be able to remove a nut without damaging the threads on the bolt, and I found that claim tenuous. It seems like the cutting bit is too loose in the shaft: it spins a little, and shifts up, so it was hard to make a clean cut through nuts that are flush on a flat surface. I had 6 rusty nuts/bolts I had to remove, and I only got one off with two first try cuts. The other 5 took a few tries relining up, and I ended up mangling the bolts. I didn't care because they were also rusty (and replaceable) and would have used a hack saw if I could fit it in. I'd say it took me about 45 minutes to get all six off, which was vastly better than any other option I could think of. So in my case they well were worth the price even if I never use them again, but I suspect there are higher quality and more expensive options out there if you want to avoid damaging the bolt (as they claim to be able to do)
I should add I've never used a nut splitter before, so I may also just be expecting too much.