I'd write a more detailed experience, but I don't have the time. here's my quick response.
Dits is a great electro marker, and with the right care and attention, you'll have a marker that shoots amazingly fast, never chops paint, and rarely breaks down (if ever.)
I bought my diadem in december 05. - replacing the barrel, reg, grips, asa and lp reg right off the go.
While the marker may not be very smooth and "pretty" compared to dm's and other high end markers, it'll shoot like a champ. Out of 20 or so cases I've broken less paint then I can count on my fingers. the marker itself is light and compact and easy to point with.
My only beef with it is that the trigger is a bit sloppy. meaning it rattles when you play on it, and it wiggles side to side a tad.
It's fully adjustable for front and back play making a nice crisp response on the boards switch, and it's minor wiggle annoyances does not effect performance.
most parts can be found at the hardware store, and the only thing I'm really worried about is the ram, but I think if I just take care of the damn thing (matinence regularly etc) I won't have any problems... haven't yet anyways.
most firing issues can be fixed with a fresh battery.
comparisons: timmies and older dm's.