This device looks cheap. I don't think it can produce good quality image.
P.S. I thought it is not too hard to find RGB SCART TV in Europe, or at least Commodore monitor (I even found one in USA):
P.P.S. Try this simple converter from SCART to S-Video to get black-and-white picture (from green):
P.P.P.S. Better SCART to S-Video converter (also black-and-white - I didn't test it):
P.P.P.P.S. This is cable for Sprinter video to SCART:
Sprinter - SCART (Name)
===================
1 - 18 & 5 (GND)
2 -
3 -
4 -
5 -
6 -
7 -
8 -
9 - 7 (Blue)
10 - 11 (Green)
11 - 15 (Red)
12 -
13 - 20 (Sync)
14 -
15 - 16 (+5V)
Original SCART cable for Sprinter has resistors inside - remove them and picture should be better