I've used one for many years; lots of fun. Lots of software for it, even digital decoding, good selectivity - be sure to join the RX320 Yahoo group. There's a series of folders there with the applicable links.
Don't depend on just the little whip antenna that comes with it. Sometimes that works just OK, others it doesn't seem to work too well. A good antenna is highly recommended. But there's lots of information on that topic on the Antennas wiki :.>> 73s Mike