Currently rocking the v3 for ADS-B reception, using a λ/4 wave vertical w/ ground plane, feeding it into TAT (theairtraffic.com) while the v4 is being used for general reception tasks. (Primarly POCSAG, DMR, and TETRA for local POL/FIRE/EMS/SIA reception and decoding)

Absolutely great little bits of kit for their prices.