We haven't done the chef's table, but we did eat in the Queen Victoria room and it was unbelievable. That being said, if you don't really appreciate food, you won't feel like you get your money's worth. After our meal, one of our group actually said "that was good, but I really could've just had a good hamburger". She didn't appreciate it, so she didn't enjoy it or at least didn't think it was good value. Nothing wrong with her opinion, just realize if you are happy with a hamburger or pasta, you probably aren't going to enjoy it.
Also, despite the pictures and the apparently small portions, we were so stuffed before dessert that we basically had to force ourselves to eat dessert. We ordered a few different things, but struggled to share because it was so good.
We won't do it every year, but our hope is to make it to the chef's table in the near future.