It does fly indeed ok it is no speed demon but it is stable in the air. I have the DJ-3, and speed in a little slower than the DJ-3 If I had to guess at it I would say in the 50-55 MPH range.
I got mine HERE and Mark was very helpfull in setting up the power unit.
One thing that should be done is get the fan balanced but that is with any DF unit takes only a litttle while to do and no different than doing a prop.
The non steering problem is on all the DJ series of planes but other than they they do fly well.

Have fun