This is a very nice app. It's worth downloading and trying just to see the job they've done with the interface. It has a super-polished, slick feel; the prompts and help messages are very casual and conversational; and it guides you through the process in a very nice way. Within moments I'd uploaded a pile of photos, tagged the people in them on FB, and had someone commenting on them.
The only thing I don't love is that the photos end up on batch.com. I guess they have to have a website somewhere, otherwise, what's the point? But I worry about storing my photos on yet another website. I remember when I created all kinds of albums on Sam Odio's startup, Divvyshot, including ones of the birth of my daughter, and garnered all kinds of memorable comments as a result.
Then one day, it was purchased by Facebook and poof, goodbye photo albums, goodbye comments from friends and family.
That said, the sheer convenience of this app might overcome my worries...