Are portable ovens safe?

  1. I want to try making the blueberry muffins that was posted to tpf a few months ago, but I only have one of those little portable ovens. I always feel that they're not a "real" oven, and that it would explode it the temp. was too high for a long duration. Haha. I know many of you here cook, so I just wanted to get some feedback before I attempt to explode my kitchen ;)