A great site. I have found some new friends from around the world who share my interests. I love sending letters and receiving them in the post from my friends.
I have been using GPF since 3 years and got to know some nice and interesting people. I met some of them in person. However, it takes time to find a good friend who really wants to establish a nice and long-term friendship. I have been often contacted by people who exchanged one or two letters with me and then just gave up... but it's still worth trying, you never know... :-)