Guess I should clarify, I don't use a saw for bone, I use it for wood. I take an elk apart with a knife only.
I've messed with the Stanley, pretty cheap/flimsy. Same with the Sierra. Even my heavily modified Sierra weighs nearly 2 oz's more than the Opinel. The Sierra doesn't pack well either.
The Opinel isn't a bone saw, it's a wood saw... for that it's about ideal for backpacking.