The Good: Price, durability, reliability
The Bad: Weight, paint wears off too easily
I used this cranks for 2 or 3 years and did not have a single problem with them, the only reason I changed them was because of the weight.
If you are building a bike on a budget you should definitely opt for these, you just put them on and forget them.
If, on the other hand, you have weight concerns or if the fact that the paint on them wears very easily puts you out, search for another option.
Bottom of the line is, they do their job, and they do it great, if you're on a budget, go for it.