I also love the Top Hatch. I currently use a TX-6. I sold the Top Hatch when I upgraded. I have kicked myself so many times for doing that. It hatches 40+ and there are times when I need to hatch more than the 16 bantam eggs in the TX-6. I started with the HovaBator Still air like so many and it was not a happy experience. I upgraded to the Top Hatch and I really like the unit but had been reading about the reliability of the TX-6 and found on used on
Ebay and bought it.
The Top Hatch is a bit on the noisy side and the flashing light could be annoying if you don't have a place to put it. I had mine in the closet of the extra bedroom. It works very well if you have a stable temperature in the room. I don't have central heat in my house so I use a bubble wrap jacket on the tub. Many have made nice quilted cozies for theirs. I love the turner. It rotates the tub and the eggs bump against spokes to turn. That is the same method as the TX-6. When it is time to stop turning, you just lift the tub a slight bit to take it off the wheel and that is all you need to do. You can add water through the vent on top with a straw so opening the incubator is virtually unnecessary.
I recently have had to replace my entire flock and need a new incubator and I ordered the Top Hatch but it arrived broken. I needed one desperately to hatch out the eggs I had collected from my chickens so I settled for the HovaBator forced air. I am so disappointed. I am sure I will get a fair hatch but I find it much more Awkward to use and the durability of the unit does not compare to the Top Hatch. I have read bum reviews on the Top Hatch but nothing I have read could not be simply fixed by finding a good place to put it and by making a simple jacket for the Tub.
In any incubator you get, there are times when there are just bad parts. If you get one the will not hold steady temperatures in a stable environment then you have bad parts and need to contact the manfacturer. Top Hatch people are Awesome to deal with.
Beware, the tub turns by rotating on ball bearings and they are very small. Make sure you have a screwdriver with a magnet on the end when taking it apart, those little ball bearings can get away from you and they are hard to find on carpet. Ask for a second package to be included with your unit. I have found that Cutler Supply has the best price.