I had my first shave with the SS70 this morning and all I can say is wow, 2 passes and it was the best shave I've had in a long long time...
I originally paired it with the MR8 handle, it was excellent around my mouth, which is where I've had issues for 40 years; for the rest of my shave I changed the handle to the MR3, the extra length gave me more leverage and made the two passes very smooth, with the exception of the same spot on my chin that I have nicked every shave for 60 years. Seriously.
This is a terrifically engineered tool, just outstanding. It was a pleasure shaving my very coarse and wiry 4 day old growth on this 75 year old face.
This is a somewhat aggressive head, but extremely smooth. Now I know for anything beyond 2 days, this will be my go-to.