Of course not everyone will like a Wal. BUT. I have tried about 6 Wal's since buying mine, and all have been consistent in construction/feel/sound. Unlike a Fender bass. One ( Usa v Usa etc) compared to another can feel like night and day. It never ceases to amaze me how a Fender is said to be the Mecca ( ok original electric bass, hats off) of basses, yes there is so much trepidation from potential owners when it comes to finding on that feels like a good one.
So, a Wal may not be your bag, but the only way it could be a ''bad one' is if someone has tampered with it in a careless way. Absolute craftsmanship cannot be denied.