I had a very pleasant 1.2 mile range around a slightly curving road just now on K band against a construction sign. I had the detector in A mode and was going about 55mph. The detector started with a weak K blip, then slowly ramped up till it went to full alert maybe 500 feet from the sign.
Overall I'm pleased with that alert. While I didn't have my V1 with me for comparison sake, I'm pretty sure that in this situation the 9500i performed roughly on par with the rx65 and V1.