What you should do before you buy is go to Ravelry (it's free to join) and take a look at the sweaters there. You can see what they look like in various yarns people have used, read about any problems, etc. You can sort by helpful comments, do a search on a word or part you may be interested in... Here's a the links.
There are 30 projects for this one -
There are 253 projects on Ravelry for this one -