Pros: Small and simple.
Easy to setup.
Reliable*
Nice for older laptops stuck using b/g bands.

Cons: Range seems nice, although it is misleading. Despite showing strong signals or even max strength, the product will often slow to a halt or need a reconnect.
After a while of using the product you get a better feel for what the reliable range is.

Other Thoughts: *Assuming you are within range, it does a better job than other wireless cards that don't use an antenna (phones, most laptops, some PCI/PCIe cards, ect.) and for the current price of $15 it seems to be right where it should, although full price of $50 I would expect more. I feel 3 stars is appropriate considering $15 isn't standard price, at $15 a 4 would do, as it is cheap and reliable enough to cover any basic needs and may exceed some.

Pros: Mouse hits a very nice price point for it's performance.
Texture is nice to the touch, and extended play time.
Glides well on metal and cloth mousepad surfaces.
All keys are have low resistance to click and give good feedback.
Cord is sufficient for most desktop arrangements, whether desktop is on the floor or desk.

Cons: No real cons.

Other Thoughts: Personal preference is probably the most important factor with mice. What may be comfortable for one or the right size could be off for another. Once you get used to a particular mouse, it will take time (at least a week) to get to know the new one well enough to decide if it is right for you. If this mouse meets your price point and looks to fit your preferred style, go for it, solid mouse.