I bought this foot rest while exploring my seated guitar playing position. I've since moved on and found ways to play without a separate raised platform, but I can definitely recommend this foot rest to anyone in terms of build quality, ease of use and sturdiness. The one slight caveat with this product is that the rest angle cannot be locked. Instead, the angle of the foot rest is determined by the pressure you place on it with your foot on either the front or back of the foot rest. This may or may not be a feature to your liking, but I found it somewhat troublesome.
Nevertheless, the foot rest is well made and will serve you well if you're looking for something to help with the ergonomics of seated playing.