The VX-5 will not do Full Duplex which is extremely helpful when working satellites. Full Duplex allows you to hear the downlink while you are transmitting on the uplink so you can tell if you are hitting the satellite or not.
It's a great radio, but that is one feature I wish it had. The only way around it is to deal with half-duplex or buy a second HT for the uplink.
A.J.
KB3HGY