Discussion with these 3 low spread brokers

Due to ECNs do not support MT4(any guy have search which ECNs are propose to have MT4 connectivity ?), I would like to search other brokers which offer high leverage, low spread, tight spread on news effect.

I searched three fx brokers
http://www.crownforex.com/
http://www.fxpro.com/
http://www.activtrades.com/


anyone have experience on these brokers?

low is not enough, make sure that its fixed. If its not, getta hell outta there

i dun mind it is not fixed, since ECN also have floating pip. Yet I really wanna know do these brokers dun freeze their server OR may a large spread (say 30~40 pip) in news period.

and these brokers provide CFD for metals. It may be an advantage.
Yet , are there any live user there?