Yeah they are mate, they're not a lot of fun to apply - decals never really are, I guess.
I didn't follow any of the instructions or box art on where to apply them - just stuck them where I felt like it, looks ok I think?
I did botch up the one on J.Ridden Zaku's shield though
Btw, you might want to check out Hobbyco - they've got a post-Xmas sale on at the moment.
Received a gift voucher for Xmas, so dropped in there this morning and bought one item at full price and got the second for 50% off - these were Gundams, so not sure if it applies to other stuff too.