If you wiggle the antenna and the signal cuts in and out, who is to blame except Uniden?
So far, my SDS200 is working well, it's definitely not perfect by any means. VHF high is a total joke, and general RF performance is poor. So far, I'm happy with it, but it's lack of VHF sensitivity is annoying, any number of old scanners sitting next to it scanning rail and other VHF frequencies will be talking almost nonstop, but the SDS200 just sails through the same freqs rarely stops at all, so I deleted them. My main complaint is the time it takes to do a complete scan cycle is so long it misses a lot of stuff, so my old GRE/Whistler radios still are needed to hear most of the stuff around here.
My experience with the HP1 I had was not good. At first, it worked great, but became deaf which could be temporarily be fixed by doing a hard reset. After a while, that didn't work either and VHF high was gone, only the majorly strong WX channel could be heard across the street from the transmitter! Off to Uniden it went, and they said the unit "met specs", and it came back as deaf as it left me. Eventually, I just sent it back again, they fixed it that time, no explanation of what was done, and I sold it at a pretty big loss.