I used to always use metal angles. My last one got damaged so I decided to try this one. I always strive to make my work more efficient and easier. I was afraid the plastic square wouldn't be square, but it is. The markings are a bit harder to read than my metal square, so I can run a sharpie over them to make them easier to see. Dropping this square won't make much noise or damage floors. The markings also seem accurate, always a plus!