Anyone have experience on M-1951 fishtail parka (MJ17118) and the parka liner (MJ17119) in particular?

I've been thinking about getting the fishtail, and I have a couple of jackets I could use for layering but I'm also interested in the liner that was actually designed to go with the parka. I guess it's safe to assume that it'll work better together than a piece of clothing someone else made.