Wireless was intermittent, but this is an older MBP so I didn't want to invest a bunch of money in it. When I looked at your site and it looked fairly easy to replace, I bought a used Airport card, a couple of tools, and was on my way.
Pretty simple in the end, and everything worked! I was glad I wasn't disconnecting a lot of things, mostly screws. I had a previous condition where the top of the keyboard area is a little loose on the right, it's been that way since I got it (used), and I didn't take this opportunity to look into why that is while it was open... but I don't want to open it again! Too many tiny screws!
Now that I got a look inside, I see that these components are set up to be lifted out fairly easily, so it is less daunting the next time. I did splurge and buy the spudger, and I think that helped not having to get fingers in there to lift little connectors. The directions are really easy to understand. Also, it was dusty in there, and I didn't know if it would be good to spray with air can, which I have... advice on that? Could I have hurt something?