One of the most common and convenient plot device many anime tend to use is the "forgetful people" technique. We have seen this countless time even in great series such as Kanon and Clannad. Still, it feels a bit lame when it's revealed.
One thing bothers me a lot about stories like this is that even though the bad guy supposedly is fighting against the ultimate power to gain the ultimate power, not once has he considered that there is a chance he might actually lose. I mean, seriously, if you don't have the ultimate power, and fighting someone who does, wouldn't you at least consider there might be a chance you're not going win?!
Put that aside, Sacred Seven is a very typical hack and slash -ish anime. It has more or less everything a typical hack and slash anime has. While it's interesting from time to time, I don't think it worth the 5 hours I invested in it.
Final scoreboard:
Drama: 81 (Super-powered dramas)
Comedy: N/A
Action: 80 (Eh...)
Art/Animation: 84 (Typical)
Sound/Music: 88 (Not bad)
Character: 80 (Kind of interesting)
Plot: 78 (Stereotypical)
Ending: 80 (Very predictable)
Re-watch value: 30 (There is no need)
Overall: 80 - B-
Recommendation: If you ask me, I'd say it's not worth your time. But if you really have too much free time, this is also not the worst thing from this season.
