I have seen a pair of ultima 01 pro's online : http://www.jabong.com/yonex-Ultima-01-Pro-Ltd-Purple-Badminton-Shoes-571341.html and i was wondering how good they are in comparison to the shb series. I would like to know how good the build quality is, how good the cushioning is and how good the grip is . And most of all if it is worth the money, which is about £30-50. Many thanks!!