I had a Zon Vinny four string for a couple years. There was nothing wrong with that bass. It did have a composite neck and excellent electronics. Very light weight. We just never bonded. It sounded great and played great, but I never felt really at home with it.
Also, the looks of it were just too strange for most of the guys I played with.
String changes were a hassle, but I could use a wide variety of strings. In the end, I moved it on and the cash it freed up bought my first Dingwall.
One of the things I love and hate about Talkbass: so many basses on the used market! It's like a big candy store. I'm glad I found my flavor with Dingwalls.