Purchased kickass oven and on the 3rd use the oven base (where the element is) buckled and swelled up. This was only on on a temp of 150deg for about 20 mins so I would hate to see what would happen if I tried to cook a roast at 180 for an hour or so. The base swelled to the point where it was almost touching the bottom rack which then caused the food to burn. Contacted Australian direct expecting a repair or replacement only to be told that it was perfectly normal for the oven to buckle and deform and after further communication they now will not return my emails. My personal opinion after thinking about it is that the kickass oven has a 130W element compared to 100W for the Travel Buddy and Road Chef and this may be the cause of the problems (too much heat for design of oven). I did contact retailers of both the Travel Buddy and Road Chef and was told that the buckling and swelling of the oven base is a very rare occurrence with those ovens and would be covered under warranty. Not so with Kickass and very disappointing.PS, I gave the oven 2 stars because up until these issues it worked ok.