pros:
- good quality
- good thickness metal, sturdy
- flexible enough
- 0 mm starts at the edge of the ruler
cons:
- not cheap
- Only mm, not inches
It can bend and twist if you bump into things, but that is with every ruler like this. If you are careful with it, this one will last you a lifetime. For building guitars, I needed a long ruler. This one is just what I was looking for. It would be perfect if it also had inches.