No extra duty to pay which was great. It's very early days but I have to say the quality is quite impressive considering the price. While not as solid as my Retevis RT-82, it has a good feel to it and It's also smaller in size. The screen is not as good as the RT-82 but is very usable.
Both my Retevis RT-3 and this new radio can use the same charging base so that's a bonus.
Programming software is basic but it works. If you can program a TYT or Retrevis DMR, this shouldn't be too much bother. So far, I've programmed a couple of analogue repeaters and one of the DMR simplex frequencies. The basic DMR channel setup (Amateur UHF DH1) works with my Retevis RT-82, my RT-3 and the GD-77 so at a basic level, it's compatible.
More to test but so far, for just over $100 delivered, it's an absolute bargain!