I have been to a couple locations now and I still say that what you are paying for is the gimmick, not good quality food. I will say that the experience is worth it, maybe once for a special occasion. If you get a full meal for two people you are paying over $60, and that's without alcohol. I can pay less than that for a higher quality meal at a place that actually cooks the food for me. The dessert is exceptional, and that would be the only part of the menu I would recommend.
Just to be clear on what you are paying for: chopped up fruit and veggies, pieces of bread, and raw meat. anything that requires cooking (meat, potatoes, etc.) you cook yourself at the table. The quality of the bread, fruit and veggies was disappointing. The (very small) cup of vegetables consisted of celery, cauliflower, and carrots. I've never been to a fine restaurant that considers celery a vegetable, generally they are chopped up on salads or served with wings.
There is the cheese course in which you dip, then the oil course in which you do the cooking, and then the dessert course where you are dipping in chocolate. Dessert is made up of marshmallows, some fruit, and tiny pieces of cake. Again, for what they are charging, the quality of what you are dipping leaves much to be desired, but the melted chocolate makes even the cheapest marshmallow taste heavenly.