These are just first impressions of the Pro-58. I'll write a more detailed review later on when I have more experience with it.
Got to drive around tonight with the Pro-58(along with the X50 and 995). Almost no traffic. Decided to do a comparision run against a K band speed sign. The Pro-58 initally alert to K at 121.0 miles on my odometer. It stopped for a little while, then started alerting continuously at 121.4. The speed sign was located at 122.0.
BTW, the results were as follows:
Pro-58, 1(0.6?) mile detection
X50, 1.3 miles
V995, 1.3 miles
Received a couple Ka hits, one a half mile with him oncoming.
I do like the fact that the tones aren't overly annoying, though they are somewhat quiet. This is good for people that normally have other people in their cars and don't want to annoy them.
I was kind of dissapointed when, approaching that same K band sign form the other side(there are two of them facing opposite directions) instead of giving a K alert, it gave me a Ka alert all the way through. It started off as K, but then quickly turned to Ka. At first I was like "Damn, that is one long as Ka hit" but then I realised it was the K sign.
Going to post up a video of the run later, after I get some sleep :P