Pros: Amazingly fast, compact in size, no vibration or sound.
Cons: Limited space.
Moving to a SSD from the old traditional HDD was a little nerving as I had never had one before and had to take into account the size and price of the item. Crucials' pricing made it very simple and a week later I was installing my new Crucial M4 128GB SSD for the first time without any problems at all. It was blindingly fast to begin with but when the 009 Firmware came out it became even faster, it's a complete WIN all round for this generation of SSDs.