I don't know about you, but anything that takes money from my pocket, deserves my scrutiny. I personally don't buy things knowing I will have to modify it to make it work for me.
Now, if it were free, then I would agree, don't be picky. However, its not.
I like the idea of this, but the added bulk really disappoints me. There are times when a stylus is great. For instance, I don't use a stylus for the UI, at all. However, try using Office Mobile without one, and get back to me when you have ripped half of your hair out