Three of the five files are very good, the flat, round and triangular but both the half-round and square are a little disappointing.
The issue is the shape is lost on these last two files as they taper, the square becomes deformed and twisted whilst the half round looses the sides and becomes almost square because the edge has simple been ground down with no attempt to maintain the half round form.
So, as long as you are not buying the set to primarily use the square and half round you should be fine.