So I've owned this drive for 24 hours now so initial impressions only.
The size, weight and shape are excellent, I really can put it on my car keys and not have a huge lump in my pocket. The speed seems fine - I'm not on that much of a rush.
The downside is the slide out USB plug. This is a great design apart from the fact it doesn't lock in the open position. There is a slight click but not enough to withstand the insertion force needed to plug it into a USB port. The result is when you try and insert it you just push the USB plug into the retracted position. I can overcome this on my laptop because it is on the edge of a surface so I can grasp the drive underneath and hold the USB tab out while I insert it. However when my laptop is on a desk or table this is impossible.
If the unit were the other way up or the slider were on the sides so it was naturally grasped on insertion this issue would go away. Alternatively it needs a positive enough click to hold it in the extended position.
I still love the drive because I can actually carry it with me all the time. (My other Corsairs I leave behind unless I need them)