I have been here several times over a number of years, and the overall experience is quite consistent.
There is a page of the menu that contains cooked food (i.e., cooked in the kitchen), but I have never seen anybody order from that page, because we come here to experience the do-it-yourself cooking on the volcanic stone, not the chef's cooking!
The fish or meat -- whatever you order -- is always superb in quality, fully comparable with the very best, and you'll be amazed how good it tastes without any oil, msg, or sometimes, even without any sauce (although they always give you a sauce to dip your food into). Yes, the price is pretty high, but part of it is your paying for the location and the setting. There is not much decor, but who needs decor when the whole False Creek is in front of your eyes through these massive windows?
Service is fine, and there is a good selection of wine -- a good choice but not all of them as high in quality as the food prices may lead you to think, with prices that are commensurate with the quality.
The only drawback is that you sometimes have to eat with haste, because if you eat too slowly, your food will become overcooked (you can't adjust the heat coming from the volcanic rock as you can adjust a stove top). To avoid overcooking, you may have to remove your food from the stone and put it on the side, in which case it will get cold. It is a hard juggling act. The trick is either to order a fish dish, which still tastes good even if you overcook it, or order a thick piece of meat, like the lamb or the beef tenderloin. The rib-eye is a much thinner piece of meat, and it will become more than well done by the time you are 2/3 of the way through it.