I bought this (PM) as a base to modify for my version of a breakfast stout. I put the ingredients in BeerSmith and it came out very low for IBU's, OG, and ABV, so I added an extra lb of Marris Otter, .5 lb chocolate malt, and 1 oz fuggles for 60 min.
This beer is currently sitting on 4 oz coffee beans and 4 oz cocao nibs in the secondary, but when I transferred it at 4 weeks, my sample was delicious. Unfortunately, I broke my hydrometer on brewday so I don't have an accurate OG reading, but it definitely had some body to it and nice roasty/chocolaty flavor at room temp. It was so good, in fact, that I thought about bottling it rather than risk "ruining" it with chocolate and coffee.
So, to make a long story short...if you make this again, you may want to try adding a little extra malt/hops to get it into the normal range for oatmeal stouts.