I really enjoyed it. The music (while a bit sparse in amount of tracks) was pretty nice, the protagonist isn't some dumbfounded idiot, and the traveling to different points in time is done in an interesting way.
As far as length, I think it took me 30-35 hours to beat it, just left a few...
Well the Amazon description for Phantom Brave PSP has the same description that the lightning deal has. So it matches, unless Amazon is throwing a curve ball.
http://www.amazon.com/Phantom-Brave-Hermuda-Triangle-Sony-PSP/dp/B004CVR8K8
Well it says on the main page of Steam:
"Midweek Madness
Critically acclaimed Batman: Arkham Asylum returns with this remastered GOTY Edition.
Offer Ends Thursday at 4pm Pacific Time."
:p
They apparently used UPS for my shipping (I've never ordered from them and forgot what type of shipping I used). Expected delivery date is next Wednesday.