I have the little giant and have had NO problems so far. Temp stays at 99-100. I know this because my thermo. has the high and low readings. I think its a great incubator. Well its made out of styrofoam so you cant just toss it around but why would you want to do that anyways. I see lots of post here that say they arnt worth it but i say for $45 its well worth it.