The mouse feels good in the hand and is symmetrical. It will therefore be necessary to both righties than lefties even if the previous or next page buttons are obviously designed for right-handed (on the left mouse so). In terms of IPR, it has three positions (1000, 1200 and 1600) but the differences are minimal in office (my use). We still groping note that the mouse is faster at the maximum level which defines levels as there is no reference (no color like on other mice for example). The mouse, however, shows accurate and responsive with a clicking sound a little too strong for my taste. It holds out the distance (6 meters tested just to find that the mice marched well on screen).
Small, ergonomic, lightweight (86.6 g) and quite pretty in her blue finish, this Bluetooth mouse is doing pretty well and eliminates the need for nano-receiver. This is definitely a good pick, especially 10 (9.99 on 5/27/15). I definitely recommend.