Most of the parts that you might see there labeled swinks, is from our very own pinside member Jady Swinks!
They are professionally done, and are of great benefit, if it fits your need.
Cyberkni is correct that some/many prints can show print or scinter lines needing some extra work,
but Swinks models are top notch in precision measuring needing minimal adjusting.
I have no other experience with other files, and didnt check the whole catalog, so there may be other quality models there too.