while others like snapnames , it has Never worked for me on any quality, generic .com that i have ever used it for. When it first started up there was actually a page telling you what your chances were to get a domain. i believe one of the examples was that if you were going for a top generic domain(i believe the example was a 3 letter .com) your chance of getting it thru their service was about 3 %. i dont know how that compares with today since they no longer show statistics.
i wish i owned a company that promises nothing and charges 60 for that privilege