I purchased the SDS200 for curiosity sake. Compared to the Unification G5 the receive on the Undien at 800mhz is not as good - specifically sensitivity appears to be significantly poorer. I am able to hear the Chester west simulcast site with the stock antenna lowered almost all the way, with a signal of about -105DB. The radio is capturing the majority broadcasts though and they are intelligible. Using an inexpensive 800mhz yagi I gained almost 20dB of signal improvement and the majority of broadcasts are quite clean. Given my needs I am satisfied with the SDS200, it is a clear improvement over the 536. The Unification G5 is clearly a better receiver, although lacking in a lot of scanner functionality.