I believe this is a great overall product with the exception of one thing.
I weighed each weight to conform they are all labeled correct and in fact are the weight they claim to be. Only one 6gram weight was off. It was 6.4g instead of the labeled 6.
All of the other weights were within one tenth of a gram up or down. (Posted on 2/19/10)

This is definetely worth the money if you care about getting the right weights in your aftermarket variator. I tested all the weights and had fun doing it and this kit saves you ALOT of money since you dont have to buy so many sets of rollers. This kit pays for itself. And dont think you cant use them for more then a few miles they are such good quality i used the 8 grams for about 10+ miles with no problem,thats not recommended but works that way you can get a really good feel for which weight you like best. (Posted on 12/16/09)