They seem to have some problems what i have read about it.
It uses IR elements which heat up certain components to much and others not enough. It also does not have an convection fan so there are a few cold spots in the oven. The best thing you can do is build yourself one.
Get and mini oven with ~100W /L and mod an high temperature (microwave) fan in it to provide convection. The more expensive option would be an microwave whit convection oven and an oven wattage of ~100w per liter.