Although let's all be honest. It's nice that they include a 7 day ticket, but who would spend a whole week there?
DD (9) and I went this past summer. I will grant you we only did 4 days at Seaworld and 1 at Discovery Cove and didn't opt for the SeaWorld/Busch Gardens option because we really didn't want to go to Tampa. But it was still cheaper, per person, than our tickets to WDW for that same trip (we ended up going only to Epcot and Typhoon Lagoon because of the crowds, the rude staff and guests, and the unusually dirty facilities) and we really, really enjoyed it. We are WDW veterans (I've been over 15 times in the last 16 years and she's been 5 times in the last 7 years) and typically don't spend much time at other parks. We planned to do more at WDW but DD asked that we go back to SeaWorld instead. She has even told me that when we go back to Orlando she'd rather go to SeaWorld than WDW. Which surprised me but I think the crowd size was far more manageable (even though it was crowded -- we were there during the week leading into and up to July 4th), the park employees were really friendly and fun (we didn't have that experience at WDW at either area we visited), the crowds weren't as rabid and rude, it was super clean and everything was in working order (couldn't say the same for WDW on either count this time) and, as a result, she and I had a better time there.
From my perspective, the ticket price was worth every penny even just for the Discovery Cove day (and we did do the dolphin swim which was really great fun). It was like having a beautiful lagoon and river to yourself...very relaxing and stress-free. If it hadn't been for the lightning and thunderstorms that drove us out, we would have stayed there much longer than the 6 hours we did stay. We snorkeled, did the lazy river multiple times, did the dolphin swim, had a nice lunch, looked at all the beautiful birds, played with the rays...it was terrific and we can't wait to go back.
I guess value is in the eye of the beholder

For me, this time around, SeaWorld/Discovery Cove was the better value and experience the WDW.