This isn't my mtb-bike frame, but I want to share a thought or two with a warranty issue.
I cracked my LS Appalachian. After sending it in the CS guy was so incredibly nice and communicative. He kept me informed of the stages repair as well as updated on the realistic completion date.

They had to replace the down, head, and top tube. The frame work took a little longer than expected, but man, it is beautiful. It looks like a brand new frame.