I echo the enthusiasm for the DR400 but there is one thing to watch out for.
Just landed and shut down, reached above and behind me to unlock the canopy BANG! flat on my back. The seat frame had failed.
It's terrribly tempting to lower yourself into the driver's seat with one hand on top of the seat back. Had I a DR400 of my own I'd find some way to stop people doing it. The damage had all the marks of a fatigue crack caused by flexing.
Apart from that, lovely machine!
Mike