I have never used either the LG or the hovabater, so wont comment on them. My biggest concern with either model would be the styrofoam enclosure. Plastic is easier to clean and disinfect.
Fiddeling with the thermostat can cause big problems. I had a devil of a time getting my Brinea adjusted. I had it in the back bedroom behind closed doors away from any drafts, or at least I thought. Then I noticed cold air blowing up my leg when the airconditioning kicked on. The cold air from the floor vent was blowing right at my incubator. Closed off the vent and covered with a towel, and no more problems adjusting the incubator temperature. Just set it and forget it.