If you put the eggs in sealed egg boxes inside the incubator, you might be able to fit 2 clutches in it, and it works ok.

That having been said, it doesn't hold humidity worth a darn, and you can fit half a dozen clutches in a Hovabator if you set it up with fluorescent light grid over the water reservoir, and place the clutches directly on the grid. (I control mine with a Herpstat, not the wafer thermostat it comes with).

I had high hopes for the Repti-bator. I intended to use it the same way I had used Hovabators, with the convenience of the built-in thermostat. Unfortunately, it's poorly designed for incubating reptile eggs, most of which require a high humidity. It has too many air gaps, the bottom is full of holes, and the sponge-like humidity mat simply doesn't work. If you could find a sealant that doesn't eat styrofoam, you might be able to fix it, but probably not.