Hi, due to business travel (in fact I'm in Shanghai, China as I write this), I visited Disney Seas (and Tokyo DL) last Sept, spending one day at each park.
Disney Seas was great! Excellent shows (in English, including Broadway musical 30 min show). About 3-4 attractions which puts WDW to shame. It was packed but Fast Pass helped. I stayed at the Hilton across the street and took the monorail.
Overall nothing beats WDW, just wish they could add some of the cool stuff from Disney seas.......