Worst, I would say. I bought it for PPR pipes with diameter 40 and 50, and it cuts diagonally. The blade goes right and left, it has a lot of empty spaces, a waste of money. It claims to write up to diameter 63, but it got stuck and I had to forcefully remove it. In general, Rothenberger products are of mediocre quality

The durability of its blade is unacceptable!!! From the first time I cut a 40mm PPR pipe (a simple "green" fusion pipe), it started to jam, as if it's made of aluminum foil.... It performs perfectly on small diameter pipes, but why carry this bulky and expensive cutter if you want to cut small diameter pipes? I was surprised by the unacceptable durability of its blade, because its smaller "sibling," the 42mm one, is very good. However, I would not recommend it and I would not buy it again. I feel like I wasted my money...