This is my fourth one – I've got one white and three black. Two died over time due to massive overuse, so really I've bought six :)
Pros: Buttons last a long time. Good Bluetooth range. Excellent battery life. No lag on “wake-up” – you don't even know when they sleep. High fidelity laser. Works on a lot of surfaces and types. Fits in my hand, nice weight.
Cons: Struggling to come up with one, but maybe a better batter low indicator (feels a little bit “low, sorry, you're out” rather than giving you time to buy replacements).