Have a dozen of them. Monitor multiple P25 trunked systems with mine as well as ADSB Recevier and APRS IGate. I prefer Airspy but the cheap ones on amazon seem to work well for APRS and ADS. I use quality antenna systems on all of them and not the packages stuff that comes. On my APRS I actually run a pass filter to keep the other VHF stuff at home out of the receiver.