Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

[Q]: Felt great until it dug into my waist while sitting causing damage to my surgical site. Now I'm in pain with and without it on.
[A]: Negative


[Q]: I guess I didn't find this CD memorable, as I couldn't even remember what it sounded like. There were no particular pieces that jumped out at me and cried "Dance to me." Overall I was not that impressed.
[A]: Negative


[Q]: This Sony VCT-TK1 is by far the best pocket tripod for instant use. I take it out of my pocket, screw on my camcorder, and it is ready to instantly take videos or self pictures.(Incidently, I have a wide variety of other different pocket-type tripods with three small legs and adjustable ball pan and tilt, but I do not use them.)
[A]:
Positive