Sorry for digging up an old thread (looking for info on an ESB), but I've made the Chimay Blue out of Beer Captured and liked it. You may want to run the recipe through some software if you want more than a 1.5 gallon boil; that's one problem with the recipes in that book...they pretty much all call for tiny boils if you're doing extract.
At one point we did a side-by-side with a bottle of the commercial stuff when ours was a little young yet (only 6-8 months). They were pretty close; ours was a little sweeter (possibly extract vs. all-grain difference) but the general consensus was it was as good or better.