Soundline ribbon loudspeakers..., anyone??

OK, these speakers have caught several people's attention here, including yours truly. There have been (3) prior "posts" asking if anyone owns a set, has heard a pair?? No replies!

For around $3500. a pair, (using a ribbon supplied by Bohlender-Graebener, the same co. who make the drivers for the ultra-expensive Wisdom speaks, according to TAS # 144 --surly SOMEONE by now has at least HEARD 'em and can comment???
How do they compare to Logans, Maggies, Apogees, etc.?? Anyone!?! These insatiable inquiring minds want to know! ;)