Well as far ass commercial ones, I have tried the Zoo Med reptibator and the exo terra incubator...both had their issues, the zoo med was just cheap, lid just sat ontop with no real seal. The exo terra was very good the only thing was the huge temp difference between the upper levels and the lower levels, it was about a 5 degree difference. Hovabators so far have worked just fine for me, they are cheap and consistent and work well.