30 hours for the main story does seem slightly short by Atlus standards. I just checked on my game of Devil Survivor Overclocked, where I just did the main story, and it was clocked at about 40 hours. Persona games take about 90 to a hundred hours, and I think I was clocked at 40-ish hours in SMT IV before I got bored of it, but I can't confirm that because my friend lent me his copy.

The nice thing about Atlus, though, is that they tend to be pretty honest about game play time, and they even sometimes underestimate. So when they say the main story will take thirty hours, it won't end up taking half that long, as some developers are wont to do.

Ah, ok. Still, that's kinda short for a game looking to be similar to Persona.

It's closer to the length of a Fire Emblem game than a SMT/Persona game.

Really? I've clocked around 300 hours in Awakening.

Just in completing the main story once? o.o

How long is SMTIV?
Because it took me 95hours my first playthrought (yes, grinding)

HLTB has it at 43 hours.

Nice. Maybe 50-60 for the main quest. Good.

It took me 112 hours the first time, because I got stuck shipping people.

Daaaamn. The HLTB is about 30.5 hours. I only spent 23 hours on it (mainly because I generally rush through SRPGs).

Chances are this game will probably take you a while then, too.