Anyone had an experience of electrostatic speakers?

[Test Electrix]

I was going to use them for mid range (the system I'm going to build is tri-amped and apparently they're not so good on treble or bass) as I read they're good for detail. What do you lot say?

 

[sdclc126]

I would post this question in the Full Range forum - lots of folks there will have good feedback and advice for you.