I thought it would be old fashioned and it wasn't on my radar at all this past year. We happened to catch it as we made our way down Main Street, and we loved it! My son was totally captivated, it was well done, and really something to see. Next trip I'll know better and try to see more. Its a classic show but the technology is bright and seamless, it doesn't feel old fashioned.
That said, once would be enough for a trip for me (vs Wishes, which seems a lot of folks view multiple times on their trips). I wouldn't change a ton of set plans/ADRs to see it, but it can be easy to catch one evening.