indescribable beauty, litteraly... you can't even begine to describe what you see, best one can come up with are some metaphores.
Can be pretty fast, 5 minutes or so if you can't relax, 10 to 15 if you can. Keep eyes closed till you are SURE it is over.
Fill your lungs completely, and exhale the vapour about 3 times...more if you can.... you will start feeling it before you finnished the first puff, at 1 minute you will be totaly in another dimension... if you don't hit it hard enough, you get stuck this side under the crysanthemum ceiling.