Has anyone tried the Eheim 3585 LIQUIDOSER?

["Colin Anderson" <colin_anderson at gticalgary_ca>]

I was browsing the Eheim page and came across the following, has anyone here
tried it?  Recommend it?  Alternatives?

Eheim 3585 LIQUIDOSER

The Liquidoser doses 1 ml per rotation with up to 8 rotations per 24 hr.
period. It has an optional push-button for manual dosing, electronic
programming for precise dosing based on aquarium size. It is
battery-operated with two stage low-battery warning and safety cut-out
function with an LCD display with clock. The batteries are included.
Electronic programming control for daily precise dosage, to suit the actual
size of your particular aquarium.
Option of manual release button operation.
Visible filling level through transparent supply reservoir.
Two-stage battery alarm with safety shutdown, LCD programming display and
clock time.