The actual operation of the cutter is awesome. This received 3 stars for 2 reasons:
1. The box had 4 booklets of instructions. Not one contained English. I had to use the pictures to guess if i had the parts put together right.
2. Since I had no instructions, I could not assemble the included handle correctly. I believe this was also because the hardware was not correct. After 45 minutes I gave up and decided not to worry about the handle.
Once I got everything tightened up and used the cutter, it performs great on my 525LK. The blade nut did come lose on first use, so I'll have to keep an eye on that. I do like the included travel blade shroud. Nice to keep the sharp edge protected.