But now to the advantages and disadvantages of the mouse:
+ Ergonomic
+ Good workmanship & Apparel
+ Only one battery needed
+ Mouse wheel is very good (as opposed to M705)
+ Perfect size for portable use (not as fiddly as the small notebook mice Standard Size has)
Only negative argument I can attach the weight. It is for me personally a few grams too light, but that's a matter of taste and because of the individual Battiere.
Strong buy recommendation!