I think it depends on how long your stop over is or how much time you have to kill before your flight and if it is a few hours the price is well worth it. I wont be flying first class again and like you aid it is good to experience this at least once.
experiencing it a couple times was really all I was trying to accomplish. It has been a while since I have been on a plane that even had first class but I do remember for the hell of it looking at what it costs and as you would expect, it is insane. Something like $15,000 for a trans-Pacific flight. Honestly, it wouldn't matter to me how rich I was I would never pay that much for a seat on anything.