have used gtk-gnutella and at the moment phex .

if i have to explain both clients with something i know from a another network :

gtk-gnutella = emule
phex= edonkey

so i prefer phex , not too much settings , easey and good understandable settings tab .

running pretty good , my opinion . absolutely equal or better for ME then the gtk version of gnutella .

support is oke , that is always fine .....