I own a pair of ML Prodigy. They sounded good until I heard what appeared to be a middle C disconnect between ESL panel and cone driver (which @ghdprentice alludes to). Then I tried the Quad 2905 - much improved.
Best of all, the Quad ESL’s can be hot-rodded way up with a better power supply (you may laugh, but it’s demonstrable) and better high voltage caps, and better step up transformers. I’ve done the experiments and every upgrade is significant, not at all subtle. To me. YMMV