I would say DeKang is really great.
I actually use Red USA a majority of the time.
Some of the flavors could be mg thinned down (with plain VG)
Joye Tech VG is good, but I couldnt rate it as good or better than the GP or DeKang
We have it because of the variety it offers.
It is good, but I do not think you could mg thin it as much or at all.