I booked the Fantasmic balcony for 3/22. If we're in So CA lately, it's going to rain and rain it did. Just for the heck of it, I called to see if we could reschedule for the next evening; the balcony was sold out, of course, but there was lots of seating for the premium viewing down by the river. I have a family of 5 and it was Spring Break, so I decided it was worth it to try the premium seating. However, I must say that I was not impressed by the superiority of DL's Fantasmic to WDW's version. I was very impressed by the Columbia, and it was fun to be closer than usual; otherwise, the images on the water screens were not as clear as in WDW and the show felt shorter. As has been mentioned above, the desserts at the premium area are not that good but the service was excellent.
Overall, I enjoyed the experience, but I won't do it again. I'm happy to have seen DL's Fantasmic, but in the future, I'll stick to WDW.