Have flown the 200, 300 and 400. I did find the 400 hard to get a good landing out of, but flew with a lot of Captains who could manage fairly consistantly good ones. Here's what I learnt....
If one sector ends in a place with a wet runway ask to fly that sector - you can nearly always get a nice landing on a wet runway.
If the runway is long enough do a flap 15 landing.
Again if the runway is long enough add about 2 knots onto your approach speed.
Don't take the power off until your main gear touches down.
The 200 and 300 were easier to land well, but I preferrred the 400 in the end. The Performance is so much better and the ROC after take-off is comparable if not better than some small jets. All of them were great in a x-wind because you could put nearly as much wing down as you liked to counter the wind in the flare.
I loved it on the Dash - fantastic aircraft to fly despite some strange quirks on the APFDS as already pointed out.