I have had my Janoel 12 for a few years now. I live in Australia. A very hot part of Australia. Well at least from mid-spring, through summer and into mid-autumn. I just want to make people aware of a few issues this incubator has. Particularly if you live in a hot climate like Australia. Firstly humidity. When following the instructions (100ml) it WILL give you an average of 65% Relative humidity. Because this is all about Surface are and not the quantity of water, you will be able to maintain a lower humidity by using a small shallow dish in the bse of the Bator instead of filling the water on the floor. So a Plastic lid from a Metamucil (fiber for old people like me

) container gives me ~50-55% RH. But yes, if I fill the floor with 100 ml of water I get between 60 and 70%.
The second issue is heat control. This unit has the transformer (power Supply) housed inside the Roof of the Incubator. This will be ok any many climates, but not where I live. If the Abient (Room Temp) is 32c or above then the Built-in Transformer and other electronics produce enough heat on there own to push the Incubator temperature above whatever you have it set at. Right now I am incubating Eclectus Parrot Eggs, but before that, we hatched many chicken eggs. However, we were constantly trying to monitor for "Over temp" Issues and having to turn the power off etc. Eventually, we purchased an Inkbird ITC-308 Temperature control Thermostat. Basically, the 240v power that we have here in Australia is fed to the Incubator via the inkbird Thermostat/Controller. I have dropped the Inkbirds Thermocouple (sensor) in through the top so it reads the internal temperature of the Incubator. That means that Anytime the Incubator Temperature Exceeds 37.1 it automatically cuts the power, untill the temperature drops to 36.7 and then it allows power to be restored to the incubator.
The other thing that's great about the inkbird Temp controller/thermostat is that it has a very loud alarm that can be configured for both high Alarms and Low Temp Alarms. It sounds somewhat like a smoke alarm. this alerts me to the fact that an "Over-Temp" Event has actually occured. (there is also a model that has WiFi for reporting and logging to your smartphone etc).
When an over-temp event occurs, I then switch on a 6 or 7 Inch Destop fan to blow on the top outside of the incubator lid. This seems to help disapate any excess heat. but be very careful about doing this. Because, when the Ambient room temperature again drops back to lower temps then the fan can cause so much heat loss that the poor, cheap and weak Janoel 12 can not make enough heat to combat the Desktop Fans Effects and then you have the opposite problem (not enough heat).
For e.g. One night, after a very hot day. I had a few glasses of wine and went to bed forgetting that I had employed the use of the fan. When I got up in the morning and checked on the Incubator, I found the Incubator was struggling to bring the temperature up past 30.0c So perhaps employ the use of a timer on the fan power.
To sum up I would say that in a sense and in some climates the Janoel 12 represents great value for money. but if you are a serious animal lover and losing your babies would cause you great distress and especially if you plan to hatch many eggs of one kind of or another over a long time I would suggest, nay implore you to consider a slightly larger investment and get something like the Borotto Lumia 8. That's what we are gearing up to buy.
One reason that we like the idea of the Lumia 8 is that it is a 12v model, which means the 240v to 12v Transformer will be placed outside of the Incubator, hopefully eliminating Over temp events. Unless, of course, the ambient temperature exceeds 37c. Where we live, we usually get at least 20 to 30 days of the year above 40c (outside) and some days we get as much as 49c. On those days it would be possible for the room temperature to exceed 37c. Although in that case, I would move (and do move) the Incubator into the bedroom where we have an Air conditioner. However, I am reluctant to do that as our bedroom is very noisy for a whole bunch of reasons, Our Pet Dogs also sleep in the room with us.
I have read elsewhere than in cold climates the Janoel 12 often has to be covered with a towel or other insulating material to assist it in maintaining temperature.
If you buy Janoel 12, it is very possible that you will have to do some tinkering of one kind or another to ensure success. After you purchase a fan, a quality thermostat, and maybe even have some failures, you might find yourself wishing you had been a little more generous with your spending (like we have found). Other than that, it's a great low budget way to get started in Incubating and Egg Hatching.
To be fair, you will read Posts and articles from many satisfied Janoel 12 Users. Just saying you should be aware of this if you live in a climate that is considered to be a hot climate or a cold climate.
Good luck and Happy Hatchings!