He has more of a problem sitting down then getting up. Since the leg only bends within an permitted range, his leg sticks out when sitting which it didn't before (the leg sticking out is indicative of a torn CCL, btw). He did just make it up his ramp with the brace on (as I was typing!).
Everything I have read says that walking with the brace does not really build muscle, but stabilize while scar tissue forms around the knee. When he actually walks (as opposed to hopping) with the brace it looks identical to without the brace. Same amount of limping. So if it doesn't help and is more awkward, I am leaning towards to returning it. I have 2 more weeks before my return deadline to decide. There is supposed to be a window in the rain, and I will try and walk him with the brace for a few minutes.
we just walked next door with the brace on (with booties for traction). Some old guy immediately tells me my dog is limping in an accusatory voice (duh! I am not an idiot). It went OK. I will try a once a day to see if there is any change.