Pros: Fast, durable, portable, stackable and scalable.

Cons: Gets hot with a 500gb 7200RPM drive. Plastic end caps feel cheap and very tiny/short screws hold them on. Large stupid looking logo/label/sticker on top.

Pros: Bought it in 2011 and it's been running strong ever since.

Cons: Tiny weak screws hold the plastic end on.

Pros: I got this memory for my Macbook Pro (2.8GHz, 15-inch, Mid 2009) and they have worked flawlessly. No concerns and no worries here.

Cons: Not free and now I don't know what to do with the 2x2GB sticks that came out of the system.

Pros: Requires no power. Portable. Works as decent speaker phone. Looks cool.

Cons: Uneven bottom or rubber feet so it will rock back and forth like a cheap restaurant table.

Pros: As the title indicates. It's fast. Lot's of space and serves it's purpose. Love the rubber housing too.

Cons: N/A