Yea, mine works great, had great hatches with it, & its a lot cheaper to build one. but I dont knock the hovabators either got one of the older mod. & it works great, I would stay away from the LG though, just my opinion.
My friend has one that he made, it is about as big as a sportsman and works just as well. He uses a reptile thermostat for the temperature control and 100W light bulbs for the heating element. I plan on making one like it, then selling at least one of my hovabators.