I was using another service but was having some problems (at the time I just figured that there wasn't much I could do about it) but continued to use the service. A friend of mine suggested I try GavelThief. He said he had good results and I ultimately decided to try it because they offered a 2 week free trial (I figured, what the heck, might as well because I get two weeks of free snipes).
What an improvement over the last service! With GavelThief I've experienced ZERO missed snipes, friendly and helpful customer service, and it's affordable.
I've been using GavelThief for 2 months and I am not looking back.