Did they flake, or just dis-colour?
The anodising was incredibly thin, so it just wore off.
I-links are a bit of a hassle to fit in that the housing does compress more than you may expect, I initially set mine up nicely, then when I first shifted on the stand the housing got about 6" shorter, so I had to take it all apart and put some more 'beads' in! At least it's not like Nokon when you're fitting individual ones, they all clip together.
I find they shift very well though, I did have problems with ghost shifting on Nokons, but it wasn't a good cable run, I've got full length outers on my Epic with I-links.