Like most of you guys, at first I was against dot markers. But for the past several months, I got a hold of a NS Design CR-4 EUB which came with dot markers. I use it as mainly a silent practice bass for at home, and I try to play more on my Chrissy when possible which has no markers. After several months of banging on this thing, it seems that the markers ARE a big help. My intonation is a heckova lot better now and I feel more confident with my intonation playing pizz. My guesstimates are that I was probably about 35% dead on with my intonation before, and more like 50-60% dead on after practicing with the NS. Which to me is alot. The rest of the time I'm fudging it and it's not noticeable to me that I'm off slightly (I hope that other folks don't hear it either).
Although my perceptions could be skewed as I do practice arco from time to time. Still, there's definitely a confidence boost from having practiced with the NS. I practice the NS by not looking at the dots, but only as a spot check now and then. Even with the two basses having different scale lengths, I'm able to intonate them equally the same I think.
I like the idea of subtle pernambuco dots. I think Ray Parker was definitely onto something. I don't like the idea of marking everything, just one probably at the octave and one or two more for TP would be nice.
Thinking about it now, tuners don't work, they're too slow and can be slightly off because of how you pull the string. I tried that for a long time.
I highly suggest you guys try it if possible... I think it's worth giving it a whirl before you shut the idea down.