I'm at 38 hours and counting, right before the battle with Yunalesca (she's beaten me once, due to carelessness). I'm taking a break from it currently, to give Disgaea and Viewtiful Joe a try.
In fact, I've abandoned and picked this game back up about three times already, and I just can't leave it alone.
Last time I started up again, I was in Mt. Gagazet, forgot which direction I had been headed three months ago when last I played, and spent an hour backtracking over already-covered territory. At least it was healthy for my sphere grid...