KG1000G has a few features that make it somewhat unique (well other than it is most likely a rebadged radio-abet that is a different story). Some of these are not unique in and of themselves, but I don't know any other radio that has the combination of them.
It have superior sensitivity, frequency stability and selectivity over cheap radios on a chip due to the Superheterodyne receiver. They can sometimes rival high end software defined radios.
It can monitor 2 channels and multiple bands
It can be programed for a lot of relays, including multiple relays on the same channel.
It has a fairly full feature remote faceplate (as apposed to a faceplate on a mic or a connected faceplate).
It does not have features removed to make it easier to plug and use (this is 2 edged, some people will not care about the extra features and do want something extremely easy to use).
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Is it the ultimate GMRS radio - NO. If you want simple, get simple - less to fiddle with when driving. If you want a lower price, get one with a lower price. If you want something more flexibility (uhf, vhf, gmrs, hf, cb)-get a good ham radio (either an export model, or one with a MARS mod)-but understand that using that "flexibility" is illegal per FCC rules. FCC does not legally allow ham radios to TX on GMRS or CB bands (unless in a life and death situation).
Honestly, I think the KG1000G is a mobile ham radio with TX on UHF and VHF blocked and TX within GMRS restricted to comply with US law. I suspect the legal print here is you can legally own an unlocked ham radio (just not use the unlocked TX frequencies), but I bet you can not legally own an unblocked GMRS radio - and as such I have found nothing on the net on how to unblock the KG1000G.
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fwiw I have one on order - but I also have ham radios that I can use legally.