No hands on experience due to looking at the parts before purchase and finding them lacking plus way o9ver priced for value.
Looking at each part first? The reg body is not a high value item as it is a simple single stage reg. That means it can be replaced with a better quality reg from a home brew place for about $60. It does have the advantage of having the fittings screwed together already but many do not consider that a great deal of challenge.
One of the main points in favor is also one of the faults! The CO2 is controlled by the "carbon doser" which should require some Google searching for reviews. It acts to control CO2 flow by opening closing the flow as the probe calls for by monitoring the PH. Very much like having a Milwaukee PH controller do it. Except that the relay clicking in the Carbon Doser can drive folks crazy! I read that many do not want it in the same room where they sit.
One of the aspects that drive me away is that it is an item which is "all-in-one" which means one small fault, makes the whole unusable. Which has lots of potential to blow the whole purchase if one part fails and those are very suspect parts in this case. The doser has to have a solenoid to open/close flow and it is not likely to be great quality as well as the relay contacts which click are suspect. Old saying in industry, is that if it clicks it sticks! Electrical contacts which carry current like the old points on car ignition tend to arc as they open/close and that arc tends to weld them together.
So, I've bummed the whole thought with lots of noise and not much help?
My preference/alternate thought would be to go one of two ways, depending on personal situation. If you are a DIY person, buying a single stage reg for $60-70 or a dual stage for somewhere less than $100 if shopped well, and adding the parts, will let you in for less money and far better performance if a controller is added to the most commonly used setups. Another alternate if not DIY is to get a basic setup like a Milwaukee reg, needle valve and solenoid, tie it to a controller and be in for less money. This will give you the option to upgrade any of the small parts which tend to gradually become more irritating as we get more into the CO2 and get more "fussy" about how it works for us.
Considered this option when shopping parts and how to go?
No totally wrong answers, nor any totally right answers, so consider this simply my opinion which is certain not to fit all users!
First step of the shopping process is often getting to know what each item does for us so that we look at CO2 as a set of parts, rather than a single item.