I only made one substitution, and that was to use Boursin cheese instead of the Goat cheese. I always used Portebello mushrooms. They were delicious. My husband called them a "Homerun". I will definitely be making these again.
I followed this recipe closely, with two exceptions: I didn't use the butter (because the olive oil was enough), and I couldn't find fresh sage, so I used rubbed. These were delicious, and I'll use the recipe again very soon. I'll even use the butternut stuffing for things other than mushrooms. On a couple of the mushrooms, I added a few turkey bacon bits, and those were good too, but this recipe is excellent just as is, and I didn't find it difficult at all.
This is far too much trouble for the end result! very bland:(