We have a Corti 25 with automatic turner, I would always suggest getting one with a turner, saves a lot of time and dissapointment, we have had our for a few years now and found it to be excellent, have a batch in at the moment due to hatch early next week, the only thing is you have to remember to turn off the turner at the right time but otherwise its plain sailing. They can stay in for 24 hours after, then I move mine to a large packing case with a lamp over the top, I dont use any special unit and as long as you keep an eye on them and note any changes daily they seem to do fine.