I do trust my all adapters. They will work just fine. I always give 15-day money back guarantee. If you are unhappy with the device, I can exchange or take it back and give you $75 or $100 full refund if it is still in working condition and includes all the parts that were given.
Even if you are not happy after 15 days, call me. I will take the device and give you "some" money back (depends on when you return it to me. Ask me for this option if you need more information).
Just please don't take the advantage of 15-day money back guarantee. After you buy and return it, the device will be a really used one. I know if you seriously want to buy a voip adaptor to use voip services, the item you purchased from me will make you satisfied. Therefore, I give 15-day money back guaranty with confidence, because I know you won’t bring it back.
At this moment (February 3rd, 2007), none of adapters I sold came back to me yet. As I mentioned, if you are a serious buyer, the adapter you buy from me will make you happy, and you won’t return it back.