is this website www.linksmaster.com good? How to find out the difference between good and bad websites?
Well, this is a site that does automatic link exchange. That's not a good way to do SEO. The way to avoid things like that is to read up on your subject before jumping in on any shady deals.
No good.. you may want to read the latest blog post from Google: http://googlewebmastercentral.blogspot.com/2007/04/linkowanie.html