I tried using the 4wdsupacentre Kings 12v travel oven but it just wasn't getting hot enough and would take 2 hours to cook the pies (even after 1 hour of pre-heating).
I just sent it back (thank you Amazon) and have ordered this when I realized it's heavily reduced.
The reviews and youtube's on it seem good so I hope it works well..
Its 130watt so even this is a poor oven