I tried In N' Out on my recent trip to the states. Both my wife and I were pretty underwhelmed. Pretty average burger on all accounts to be honest. I get it though that everyone has their own preference.

The best burger I've ever tasted personally, was at the Shangri-La Rasa Ria in Kota Kinabalu. The meat was great, and it was done in a chinese-type bun of which I can't remember the name of right now, that had a slight sweet glaze to it. It was fantastic.