Not sure where to start. I've had mine for about a year during which I have had an on/off relationship with it.
The build quality is flawless and the neck is starting to mellow nicely and at around 10lbs it's hardly light. The bit that makes it different to a Fender P is undoubtedly the neck. Same profile as the Joe Osborn Jazz. I never got on with a standard Precision neck and string spacing but the DD is great for small hands/short fingers. I have a '78 P which was factory made with a Jazz neck. Unfortunately it's like playing a broom handle, but the tone is to die for.
I must confess to have struggled to get a similar tone from the DD. Mine was born with a Dark Star, not the stock Lindy Fralin, in fact I've never tried a Lindy fitted one. I tried a Thumper and now have a Wizard '64 installed. It came from the previous owner with TI Flats, which I dislike, and is now strung with DR 45-105 Sunbeams. I'm finally getting there.
Jazz profile neck, very low action and classic P tone - it ticks all the boxes for me now.
Set-up is a very personal thing and I would never judge a bass by what I find in a shop. In fact I haven't bought a bass from a shop in over 10 years. BBC you are welcome to try mine.