I'm a beginner in calisthenics and I travel a lot because of work. These are exactly what I needed. They are super portable and high quality. The rubber feet stick to the floor real good so they won't slide. I was a bit skeptical about the hollow shape of the feet. I assumed they would be a solid block of rubber, which they are not. But I believe the construction and shape of the rubber feet is intentional. It allows them to adapt to surfaces of the floor and stick really well. The wood is beautiful and super well finished.
Some people claim they are too low and do not have enough clearance from the floor. That was not my case. Y guess it depends on the size of your fingers, but for me it works great. It leaves enough space between my fingers and the floor.
Size is perfect. Not too big, not too small.
Overall they are an excellent pair of parallettes. Great addition to my equipment. I even thing I prefer these small parallets over my standard sized ones.