Well, the Super "P"/J arrived Monday, but, without an opportunity for an "honest" shot in natural light, I've got no pics as yet, so no bass, right? Thoughts so far:
1. The "P in a J" neck pickup is very solid and punchy, with excellent tone. I'm not enough of a connoisseur of P tone to make any pronouncement as to authenticity (there will be an A/B test with a high-end P in the near future to determine the delta), but it's a win in my book. It seriously kills through a Mesa M9 and a Berg AE410. Oddly enough, I apparently need to explore EQ on my ShuttleMax 12.0 with Berg HT112ERs, as flat it's too bassy for my taste (not a problem with my fretless J or Steinberger Q4, both with EMGs). Of course, the ERs certainly don't "hold the bass back," while the upper-mid hump of the Mesa/AE410 combo de-accentuates it. Could be that the SM 12.0 is acting up, too, after being dropped (in its bag) recently.
2. The custom series/parallel pushbutton switches for each pickup are [i:33n49saa]very[/i:33n49saa] useful in balancing pickup output and creating multiple flavors within each setting on the rotary pickup selector.
3. The 35" B string is a lot better than the flabby 34" on my 1987 Ibanez...but it's still not as "snappy" as I'd hoped. Not criticism--physics is physics, and I didn't have a chance to try out a Super J before ordering--just a reason to buy me a 37" at some point.

I should point out that the B is very useable, and I'm glad I got the 5-string. I just hoped for a bit more of the "piano tone" the long-scale basses are known for.
4. The active and passive settings on the Glockenklang really do sound alike until the passive tone control is brought into play with its classic sound--very nice implementation of that.
5. The Dingwall benefits and features that people have trumpeted for years are all completely true--light weight, good weight balance ([i:33n49saa]very[/i:33n49saa] slightly tilted toward the headstock with the fulcrum just behind the horn, but completely unnoticeable when playing seated or standing), evenness of string tension, evenness of volume across the strings and up and down the neck, cleaner glisses and reduced "pressure bends" on smaller fret wire, smooth and solid controls, fantastic fit and finish, etc.
6. Confession Time - I was a bit worried that the angle of the pickups would make using them as a thumb rest somewhat uncomfortable/unstable, since you're balancing on the corner of the pickup, rather than lying flat on the pickup edge parallel to the strings. I clearly overanalyze things--it hasn't been an issue.
7. Speaking of worries, the common one regarding the fanned frets prompted me to check my rate of adaptation from the start. For me, and keep in mind that I was using a shorter scale Dingwall, there was no perceptable difference from the 3rd and 15th frets (index finger at the octave), and I had no problem playing by feel in that range from the beginning--the angle of the frets was relatively similar, perceptually, since non-angled frets appear "angled" from one's viewpoint when you get closer to the head. The frets immediately outside that range took a little bit of attention for the first half hour, and I still sometimes doubt my placement and look. High on the neck, I still tend to misfret if I'm not looking (even if I've anchored my index finger at the right spot), and that's after a couple hours of playing. Chords get all botched up. Practice will improve things, but I tend to play in the open and 3-15 range, anyway, so the immediate effect is negligible.
8. The colors of the bass are darker than they appear in the "glamour" shots. The neck, especially, which is highly figured and more of a golden color than the bleached look in the photos. You'll see. I still think that those shots should go in the gallery in the next website update as another example of Sheldon's exceptional finish work. Not that I'm biased or anything.
9. I [i:33n49saa]really[/i:33n49saa] like the Levy's gig bag, although I've been using a gig bag for 22 years with the Steinberger, so I'm accustomed to them.
10. I need to make slight adjustments to reduce fret buzz--undoutedly due to humidity change. Better read those adjustment threads carefully, so I don't botch anything up.
Long post and occasionally OT--sorry.