just got mine.
another flawless model, just like my G-Pro.
no rattling, no scratched up edges, no scraping on the pad, both M1 and M2 feel the same and crisp clicks. using no weight or the cover and its not scraping on the pad or anything either. glides really nice on my blue zowie g-sr.
S/N starts with 1636 on box 1631 on mouse.
good luck to everyone else still waiting or going through the rma process~