I just started hatching this year and I have one each of the still air incubators -- one LG and one HB. I also made one which I like better than either of those.
Hatching is nervewracking and I don't see a way around it --- yet.
For low budget it seems that these things require constant monitoring and adjusting.
I like the HB design better because the lid fits well. I like the LG because it is slightly easier to adjust but it's very easy for the top to slip out of place and lower your temperatures.
I like the HB turner better.
Keep in mind, the turner motor is hot and will change your settings. Fire up your incubator several days before you put in eggs with the turner running. When you add your eggs, your temp will drop for a couple of days..... DO NOT TOUCH it for 24-48 hrs. unless it is too hot.
GOOD LUCK!
I've been a happy hatcher for a month now and have oodles of chicks. It's really cool, but is also very demanding with amateur equipment.
I've done a lot of "no-no's" for various reasons and am having great hatches so far (except for my first ugh!)
I read somewhere to disinfect the eggs before incubating. Fumigation is best but costly and need to send for chemicals.
I DIPPED my eggs in a 10% bleach solution, let them air dry, and then put them in the bators. I did not wash, rub, or sand them. I did wipe off big spots of poo.