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

El primer libro del Dr. Weiss sigue siendo un gran libro para todos aquellos a quienes les inquieta el tema de la reencarnación, así no crean en ella.
Positive

If you're willing to trade a little style for some substance and save some money in the bargain, this is a very recommendable device. My Apple PowerBook power supply died in what is apparently typical fashion - sparking, crumbling wire where it meets the brick - and none of the Apple stores or CompUSAs in Atlanta had any in stock (which is curious in itself). I resorted to Amazon and decided to try this one out and I've been pretty happy with it. It seems sturdily constructed, and the breakaway cable is a surprisingly handy way to save on tangles. I do miss the plug-in charging light, but that's about it.
Positive

This kit has a building diagram for only 1 project and that diagram was so poor that my husband who played with these kkits as a kid in the 60s (yes they have been around that long) couldn't easily figure it out - and he rarely has trouble figuring out anything. Otherwise there are 5 other sample structures wwhich have no building instructions and that is it.I put this completely in the category of good idea but bad reality. It is a pity, really, since it would take the manufacturer little work to produce a variety of projects with real instructions. I encourage the manufacturer to do so.

Negative