Some people really dislike the thumb groove and the ledge on the right side that forces a specific finger position.
Don't worry, I'll still buy this off SteelSeries despite their awful software driver implementation. They stand with Razer in the MOST useless driver likely to destroy your mouse movement, fresh out of the box.
Need to fill my collection with the latest gear for the Right hand here, wish more ambidextrous models could be added.
Already have most of them from last year and the beginning of this year, just need a new one to appear for this week.