The Mi 4K is closing in on the Phantom market because it's a similar size but is more transportable. It folds flat to a hight of 50mm so can be packed in your cabin flight bag on top of your clothes. The software is lacking a little at the moment too but they seem to be working on it. Flight times are good and it's selling at 1/3 of the price of a Phantom. I've just ordered one for less than the cost of a replacement 2.7K Phantom camera!
Let us know how that works out. I can't imagine owning a craft without Lightbridge, or a similar communications technology, but that's me.