Been playing over 40 years and I have two Sandbergs........they are both brilliant. Having owned a variety Fenders and a vintage Ricky, Sandbergs are a secret treasure and are one of the best guitars around, imho. Buy one now while they are still not too popular and they are a bargain second hand.
My JM4 is about 15 years old and I also have a Custom which is only 3 years old. Both beautifully built and with active circuits that give any tone you need. I think most Sandbergs seem to have a similar profile neck, about 39mm at the nut and a very slim D profile....we're talking Ricky slim here. I think they feel great and my custom is the easiest bass to play, ever!
You also get great service from the company. I wanted a new scratch plate for my JM4, just coz I fancied a change of colour. As it was quite old the factory wanted to make sure they got a good match so they custom copied my old scratch plate and sent me a new one in two weeks for £32, incl postage from Germany ...I think that is service beyond expectations.
Do you get the feeling that I like them?!?!?!?!