I have an outdoor Diamond X-300 that I sometimes connect a newer Baofeng to with no issues. On either band. This is in a Philly suburb with plenty of repeaters around and moderate traffic. I'm on a hill with a reasonably good path down through Philly and also into New Jersey. Standing in my bedroom window with a Nagoya antenna I can hit most of the Philly repeaters. On the Diamond antenna I can hear traffic on repeaters as far north as NYC area and SW to Lancaster. Selectivity is probably not as good as the big three (I've got 4 of them). I haven't tested. But it doesn't seem as good. I have one repeater about two miles from me and haven't noticed any issues with it causing receiver issues while I'm on another freq. I have tested sensitivity in a lab and it's only a dB less sensitive then my Kenwood.