I have the Er250 but really can't comment on how it flies. I bought the ARF version and been gathering the rest of the parts to complete it mainly the RX. Plus the weather hasn't been friendly. Some of the guys over at rcgroups are switching to the Eamachine Falcon 250.
I did get a chance to hover mine once with a makeshift setup and I thought it hovered well. This was LOS not FPV