Well I have only had it up and running about 5 weeks so far, but it works like a charm.
Extremely easy to program. You set the amout you want it to dose, and the amount of times in a 24hour period you want to dose. The internal programming spaces out the intervals based on your selection. You can also dose at a specific start time, and have it do it during a period of time. An example would be to dose PH up when the lights are off.
Dosing amounts seem to be spot on. I however have only tested at 5, and 20ML amounts. I tested as recently as this past weekend to make sure it is staying consistent, and see no change from my initial setting on day one.
The main unit seems to be built very well, and the display is very easy to read and understand. I was also pretty impressed with the mounting hardware that comes with the unit. It's built from both clear and black acrylic with 3/8" material. It also comes with a bracket that attaches to the tank that holds the other end of the dosing tubes all made from acrylic.
Because mine came directly from Hong Kong, I needed to get a power supply with the right plug ends.
The stand alone unit comes with only three pumps which is fine for dosing a two part, or balling lite system. Because I am still running the Neozeo system, I put in an order for the extra unit with 4 more pumps. I'm still dosing a few things by hand everyday which will be eliminated in a couple of weeks.
The unit is expandable to 11 total heads.
I give the unit a 5 out of a possible 5 stars and am totally satisfied.
If you have any other questions, shoot me a PM.
Mark