Been there. I was pleased with the result, though I counted up the total number of solder joints (for a B7 turnout IIRC). About 700 (?) ish, if memory serves (I'll check that - sounds a lot...), with cutting and forming of individual chair parts on top of that. I'd happily use the system for a small end to end, branch etc. but nothing larger, unless you have help/plenty of time/patience/into whips etc.....
HTH
Brian
p.s. There was a feature on them in MRJ some years ago, including details of a home made bending jig for forming the chairs easily.
I also had a couple of threads on their use:
http://www.rmweb.co.uk/forum/viewtopic.php?f=8&t=32709
http://www.rmweb.co.uk/community/index.php?/topic/28696-copper-clad-turnout-construction/