I had Series II for 12 years but sold it after someone in the Netherlands offered me 1300 quid for it and it simply wasn't giving me the warmth I wanted for a main bass. I loved the body and neck on mine, the necks shift because of the mahogany and walnut in them. Neither are rigid woods but they are also responsible for the distinct sound of the instruments although the ebony fingerboard helps to some degree.
I didn't like the standard Jaydee preamp, it was a bit noisy and primitive so that got swapped out for a Bartolini 3 band unit which was vastly better.
As you will see from my sig, I hanker for a GA24 5 string.