I test-rode my first Felt yesterday and hated it (it was either the F4 or the F55, can't remember which one). Granted, I am about 5'2" tall and was put on a non-wsd 50cm frame with a 52.5cm top tube. I felt like I was bent in half and really stretched out and was in lots of pain as a result. However, I have to say that the carbon frame absorbed road chatter very nicely and the price point for a carbon frame, and a combo of Ultegra/DuraAce components was the best I've seen so far. My physical therapist has said that Felts are really good bikes (he's a US Cycling Coach as well).

So, while this particular bike certainly was not for me, that is not to say that Felt's are a bad bike. I'd encourage you to take a test ride.