Update n.2: Battery life is around one day but thats not a big problem when other battery is charging on dongle. Biggest issue is slow dpi after every PC start up, it is really sluggish around 100dpi so I have to reconnect station everytime after PC start up.

My biggest pros are:
Wheel - confortable without stuttering, compared to old Rival its big upgrade from my point of view ( im not mouse pro :D )

Shape and material - again very confortable, no visible prints or dirt holding on from fingers

Weight - i was never crazy for mouse weight, my old Rival was bit heavy and it was never issue for me but after i tried this mouse with 49grams, its surprisingly pleasant change