I think Jamil recommends the higher temp at the end to clean up any diacetyl produced. I've had some diacetyl with that yeast, but a longer primary at the original temperature will work to clean it up, too.
(I'm drinking my steam beer now- it's really good!)
I like to ferment it completely out in the primary, then let it sit a week or so to "clean up", then put it in secondary for a couple of weeks at 48-50. It's a nice way to quasi-lager it, and it'll clear up and get some nice lager characteristics.