@Hyllian,
that looks quite nice, actually. Compared to NNEDI3, I would say in some areas it's a bit better (e.g. the wheels of the white van) and in others a bit worse. However, I do see some ringing in your image. Did you sharpen it with a bad sharpener? Or does your scaler introduce ringing itself? FWIW, here's what NNEDI3 does, without and with sharpening:
NNEDI3 -|-
NNEDI3 - sharpened
What kind of algorithm does your shader use? How fast is it?