Since no one is chiming in who has actually gone... We have an ADR in one month to this. If you've done TLDP then its the same plus Sparkling wine less seats.
Is it worth it? The one couple who reviewed it honestly left sloshed and said they did get their moneys worth of wine. It is, of course about the experience, not the price. You will probably have a great time if you are social and like sparkling wine. You also get a great view for Illuminations. When its done keep your buzz on an head over to Atlantic hall and dance the night away!