Summary: We babied this thing. Quit working without cause. Never again. I tend to be a fan of Microsoft products and this seemed like a great creation. Went through two of them in 4 months. Hardly what I'd call durable.
Summary: So I like most people loved this product upon relieving and using it. But less than a year after purchase it just dies... First you think its the batteries, after all you do change those bad boys often! but then you realize that the interval between changes are growing closer and closer. Finally it just stops working! And looking at the Microsoft forums ([...] this happens quite a bit! they even just tell folks to return it if its under warranty!!
Summary: I purchased the Arc Mouse off of Microsoft's Expert Zone this year, 2013. I noticed many reviews mentioned a scroll wheel issue, but I assume they mean a mechanical issue where the wheel failed completely. The problem I have is whenever I put my PC in sleep mode and turn it back on, the scroll wheel does not work correctly. It scrolls far down and far up rather than in gradual increments.
Summary: I ordered 2 and within days of purchase for one of them the left mouse button broke. For the second one the batteries would only last a couple of months, replaced the batteries and the same thing happened again. Dissappointed.