Purchased MacBook Pro with 4 GB of on-board RAM. I wanted to upgrade to 8 GB. I didn't have the right screwdriver to open it up.
Fairly well. One of the screws was a bit difficult to remove and I was concerned with stripping it. In the end, it went quite smoothly.
I usually don't do any significant electronics repair. This was pretty easy. Be careful removing the screws. I wouldn't recommend for anyone to pay Apple the inflated prices for extra on-board RAM in the 2011 MacBook Pro line. It's very easy to do yourself and cost-effective, even factoring in the cost of the tool kit I bought.