Funny notes aside, most who play VNs will always feel that anime or such aren't as good as the VN. I haven't played the FSN VN (despite having it installed for a loooong while), so i'll still feel the anime was decent. I can understand that point of view though, because i keep comparing manga i've read to anime when they make one for it >.<
I think it's very difficult for an anime to follow a VN exactly, however, without becoming very boring for the average audience. It's not the same thing as playing a VN after all.
On that note, i really should play the FSN VN already, shouldn't i? :P