Well, I really loved Go-Go-Gourmet. Gourmania isn't as good, imo, but the Go-Go-Gourmet sequel wasn't as good either.
But I like quick-paced, smooth games. Gourmania is worth a try, I think, if you liked Go-Go. And, like Go-Go, the food pictures look pretty yummy.
I don't know about the "unlimited game time" either. Maybe there's some kind of free-play mode. My demo's up, so I'll have to wait until it pops up elsewhere!