Dont know about the Sunbeam, but we like our MDF, which weve had for
years without problem. We had it checked out when we bought our new machine:
all it needed was cleaning.
The doser works quite well. We grind exactly what we need each time; the doser sweeps
it all out effectively. Also, its reasonably easier to get into the chute and extract any
grinds that didnt come out. FWIW, Ive read that doserless grinders can be messy in
scattering grinds around, whereas the doser catches them.
Weve adjusted technique to work with two grind settings, and get consistent extractions
(my wife actually uses only one, and adjusts in other ways).
Also, its built like a tank. Wouldnt want to drop it in my toe.