zyo:I guess I will go against the popular opinion based on my own experience with similar offerings from Harvey Norman.
I have a Pyrolytic F&P oven with extended warranty (they call it product replacement warranty)
After 4 years the motherboard developed a strange buzzing noise and I was offered a replacement of a similar model of the same purchase price (exact model has gone out of production).
I couldn't find one that I liked without having to fork out extra $$ (missus wanted one with steam function which costs at least couple of hundreds more) and because the oven is still working I accepted a cash settlment instead (of the full purchase price, minus product care), if the motherboard dies I will just get that replaced.
Basically got a Pyrolytic oven for under $400, not sure how much the motherboard will cost but a 2nd hand replacement can't be more than 500 I'd say.
On the other hand I own a Bosch washing machine without extended warranty and it cost 200 dollars callout for a user error (blocked pipe), similar issue with a dishwasher w extended warranty and call out is free.
YMMV obviously
Heh I have abosch wm that had a stuck sock too! Lol