The first was on my upper lip, sent me to the hospital, before the necrosis it swelled up closing off my mouth and nose so I couldn't breath. The "core" was extracted and I was left with minimal scarring, but I keep a mustache to cover it.
The second bite was on my big toe. Woke up one morning with my toe swollen to the size of a small orange. When I went to the hospital for that one, some rotting had already started. My 350 pound father and two nurses held my leg down as the doctor cut into it. They were no match, I knocked them all to the ground when I felt the blade. I now have a dime-sized spot on my big toe.
I still don't fear them, and recognize the good they do. I try to avoid spiders now though ;).