generally good quality, but glaring faults rendered it unusable without the sort of remedial repair most people wouldn't do.
the rj45 crimper seems sturdy, but the crimping die is malformed. The tines were not aligned with the contacts they are meant to compress. Also the time ends were rounded so that the contacts slid to the side. The result of both these faults was that the rj45 ends didn't crimp well onto the wires.
I removed the die and turned it around so that the tines matched up better to the contacts and also filed the heads of them flatter. It works now, but I shouldn't have to do that.