Pros: Nano receiver is hardly noticeable in a USB port, receiver fits in mouse for storage, pleasing variety of designs, comfortable in hand, never fails!
Cons: Occasional issue with staying powered on presented as flickering.
This mouse is exactly what I was looking for and Logitech really delivered here for $30.00. Though that may be considered by some as steep for such a basic mouse, I have thoroughly enjoyed using it. It is exactly what it looks like in every picture, a simple piece of hardware that does exactly what you want it to do with two mouse buttons and a center scroll wheel. Coming in about ten different styles, it will suit just about anyone's tastes as well.
Now, you may have noticed in the titles that I have said that this was my 2nd M310 in three years. The mouse never quit on me, that's for sure. Rather, I had killed it mercilessly by dropping it in a glass of soda as I was exiting my couch to get some taquitos. I cried many manly tears that night and was consoled only by the fact that I could replace the rather plain Peacock Blue color with a more visually exciting Blue Shards mouse for the same price, which I managed to snag at $19.95 on eBay (you still can!).
If you're in it for a laptop's everyday trackpad replacement or non-gaming desktop mouse, I couldn't recommend this mouse highly enough for you. If you're into hardcore gaming, however, I can't say that this is the most high-end mouse on the market and you may want to look elsewhere, perhaps at a bit higher of a price-point.
Overall, I give this mouse five out of five stars for being what it is and nothing else but reliable and battery efficient. I love this mouse, and I hope you will too!