I regularly fly the DR400-120, DR400-160 and DR400-135CDI. Compared to the PA28 or C172 they feel a lot lighter, even though the DR400-160 has approximately the same payload capacity as a PA-28 or C172.
Personally I prefer the DR400 over a PA28 or a C172 because of the stick. But I'm 1.83m and have to put the seats all the way back. Seats which don't slide but recline, and this gets uncomfortable after 2 hours or so.
On the plus side, the view is far, far better than your average spamcan. Only the DA40 or the R2160 can match the visibility all around. And maybe it's just our fleet, but the PA28s and C172s we have all have a different panel layout so you're always looking for the right switches and things. This is far more consistent across our Robin range.
The inner dial on the ASI is in knots by the way, on our aircraft.
Oh, and if it reminds you of a Citroen you may be right. At least on some models the knob that opens the canopy is actually taken straight from the 2CV.