I had no plans to do so, but a pair came up on Craigslist one mile from my place of work for an exceptional price, so I sent out an email... I didn't hear back immediately, so I figured I'd been aced out by someone--24 hours later, I got my email just as I was packing up at work to go home, and 20 minutes later I was looking at them in person.
I'm aware that the two-tweeter CRS were superseded by the CRS+, but these were absolutely pristine, and the price was exceptionably reasonable, so I loaded them up and brought 'em home. I can see what people are saying when they mention "additional effects/artifacts" that are introduced by the inclusion of the dimensional tweeter. The SDA effect is dramatic, almost outrageous with these, as compared to my 2BTLs. It's fun: enveloping and involving, but I think perhaps a bit much for me to consider them as a daily driver. I had a friend over last night, and as he heard the first notes of Steely Dan's 'Gaslight Abbie' his eyes got big and he held his hands up where a pair of headphones would sit on his head and said "The sound is right here." The 2BTLs definitely throw a stage that's wider than they are spaced, but not quite to that extent!
I had them temporarily mounted atop my 2BTLs, a bit too high and probably not quite close enough to the wall, so I know I haven't heard them at their best. As such (and with bone-stock crossovers), they were definitely not putting out the bass like I believe they can. It's hard to imagine going all-in on modding these as, just the tweeters alone would be double what I paid for the pair! But that doesn't mean I don't plan to enjoy them. I'll definitely roll them in as a change-of-pace speaker, and I'm wondering if I can squeeze them into my bedroom rig...
Anyway, I've seen others on this site say that it's worth picking up a pair of dimensional-tweeter SDAs if they're local, clean, and fully functional, even if they're not the final designs that SDAs came to have. Having done so, I can agree with that advice.