I would agree with the general concensus here. I bought my 4001 in the mid 80's. At the time it was my ultimate bass - loved the look and sound - still do. Never really got away with it though. I just didn't like playing it. Every few months it would come out of hibernation, new strings on, use for a couple of gigs then back in the case for six months. Gave it a fair shot though as I kept it for 20 years before selling it. The bit I particularly didn't like (as mentioned in the thread) was the shape of the neck behind the first fret.
I don't regret selling it but regularly see them for sale and have to stop myself buying them I wouldn't rule out trying another one at some point...
Best try for yourself!