I used the Silverknowes SfP lane yesterday. It's fine.
Making the little layby bit at the end of Silverknowes Road into effectively an extension of the cycle lane is great. It moves cyclists out of the main carriageway where the road narrows. You could do this previously, of course, but now it's much more obvious. Hopefully this bit will be made permanent.
The bidirectional lane leading you to the quiet route section is fine. The quiet route section itself is fine, largely by virtue of those streets being too indirect and away from shops for them to attract any through traffic.
Silverknowes Parkway to Silverknowes Road is a little confusing. The lane is bidirectional (though not really wide enough) to the zebra crossing, which I assume you're supposed to use to cross to the north side then transfer to the lanes down Silverknowes Road, but you're very much riding in pedestrian space here.
Overall it's fine, though doesn't really add much other than better defining what was already there.