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

[EX Q]: My husband and I were not able to attend a birthing class, so the doctor suggested we rent/buy a video. We decided on this one, and although the 'teacher' was a bit corny it was helpful. I especially liked that you could fast forward and skip parts! All in all it was a worthwhile purchase and proved helpful to us both.
[EX A]: Positive

[EX Q]: Received this in great time- I have no problem with the seller:-)BUT! The inside of the case lists all types of materials this can cut including metals, which is what I got it for.One punch through soft 26ga copper sheet and the edges of the punch bent & in some areas, flaked off. The second disk I cut did it in completely. I had to file all of the edges and it probably would have been easier to cut the sheet with shears.So, not for metals.However, I can see it would be great for leather, paper & plastics.To me it was worth the money spent on the chance that it would actually cut metal disks.
[EX A]: Negative

[EX Q]: I bought this product and would NOT recommend it to anyone. The rubber tubs are sticky and you need to wear gloves and it leaves marks on your bikes. The red rubber protecter fell off the first time it was used. The lock that was recommedned to go with it does not fit. When the tubes are locked in place you need a hammer to get them to release. The tire holder rails will not lock in place even with a pliers. I used the product as instructed in the manual and my bike fell off in the middle of an intersection! If you use this product than you need to bungi your bike in three places to secure it! Do Not just use the hooks!
[EX A]:
Negative