Arcdu - no speedbrakes, granted, but I do disagree with the props not slowing it down very well.
If you put the props to max, below FL100, you can easily get 2500-3000fpm out of it fully loaded with no increase in speed. Not the wisest move, granted, but there are times when you do find yourself high on approach and the difference in drag between 850rpm and 1020rpm really does work incredibly well at slowing the aircraft down.
The Dash can be slippery, especially with heavy loads, and will take a bit more forward thinking for descent planning rather than just entering in a target VS into the FMS and hoping for the best. Overall though, it's not been a bad thing to step onto after the joys of light twins!