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

[Q]: The product seemed like a good idea but wish I had read all of the reviews before ordering. The product is not sturdy at all. It didn't come with the number of screws noted on the instructions so I had to go out and purchase more in order to finish putting it together. That was after I spent way to much time trying to decipher the instructions. Also, the clips that hold the bag to the frame are very tight and very difficult to put on and remove. I've torn every bag I've used. I hate wasting my money; but, I'll have to buy a better one.
[A]: Negative


[Q]: I've owned this CD for a few years, yet thought something was slightly off, so I compared "Keep A Knockin" to another copy I have.Results:Original is 168 beats per minutes, while this version is 172 beats per minute.Original's time is 2 min. 23 seconds; this version is 2:16 min.
[A]: Negative


[Q]: Maybe in time I will figure this plate out, but I cannot get the suction to work and there were no directions with it as to how to take it apart, use the suction, clean it out. It may seem simple, but a harried mother needs these details! I am disappointed as it is utterly useless to me, at least as far as being a stay-put dish, which is why I purchased it.
[A]:
Negative