I have the cheapest, portable IKEA hob. I found one website that stated the build internals are extremely cheap (it didn't suggest which one to buy instead unfortunately when the person was obviously extremely knowledgeable in electrical engineering).
All the negatives aside and there are a few, it works perfectly fine for everything. I have an 8L pressure stockpot that fits on there to make cooking even more efficient. None of our pots or pans are too big for it.