I think the issues on that thread about Z12 arose from computer problems and/or incorrect settings. I guess it is like anything when it comes to investing - you need to take a risk sometimes. Maybe just do it with a small amount of money or demo trade it for a while.

As far as I can tell, FXCM still has a no dealer desk policy. I found this on their Australian website:

http://www.forextrading.com.au/advantages/forex-execution/no-dealing-desk/