I have played with the shuttles, borrowed a couple from a buddy to see how they fly, and they flew decent. for my setup seemed a little easier to get tuned for them than for my 125 muzzy's . I'm still using muzzy's. If it matters to you, you can usually still find the 6 pack of muzzy's for 32$ or so, which might buy you 3 Shuttles. For me it came down to the fact that I still had a dozen new muzzy's laying around..