Summary: Currently, I am using the K810 Keyboard and T631 mouse on my surface 2 pro. I have been using logitech mouse and keyboards for my whole life. This is because of the comfort and user friendly. I love logitech's product and I have plenty of them. I have been working on my logitech keyboard (the white and blue usb keyboard) for over half of my life. Now I am switching to the K810 as I can carry it around more easily + bluetooth.
Summary: I absolutely love this mouse. Although this is marketed for the mac, it goes beautifully with the Acer S7 as if it was designed for it. From the soft touch white to the aluminum sides, to the actual functionality. This mouse doesn't just look pretty, it gets the job done and does it well. Try to find a mouse remotely close to what this mouse has to offer and you will fail.
Summary: I can't understand why the charger is placed on the bottom. Seems like this would prevent the mouse from being used while charging. So if I forget to charge it for whatever reason (unfortunately very likely to happen) I have to wait until it has enough of a charge to use again. (yes, i know 1 min charge should equal 1hr use, still inconvenient ) This seems like bad design when compared to the K810 Keyboard which can be used while charging.
Summary: I've had a few weeks to play with this mouse and I'm very happy overall. It is very responsive - like one that has a USB receiver. I found this surprising considering that it's a bluetooth mouse - the lag that commonly plagues them isn't there. I was very skeptical on buying one that uses bluetooth but this one is much more responsive than others I've tried.
Summary: The mouse is amazing, fits in my little hand wonderfully and is light and responsive. The only issue I've had is that the white top has started to discolour from oils from my fingers touching it. One would think they'd have thought of this in designing it but apparently not. I'd recommend getting the black one to avoid the slight discolouration altogether, other than that I've been very happy with it and it is my every day mouse.