I have 3 NiteCores: an EZ-CR2w, and EZ-AAw, and a EX10 SPw.
I voted very good but not the best.
I like the EX10, very bright and the three levels of the SP are well spaced.
The tint is nice (Q3 5A) but the beam is ringy. More ringy than the usual XR-E beam, IMHO. Perhaps they are using the reflector optimized for the R2 XP-E in the warm-tinted EX10 SPs?
Runtimes are very good. The UI is a bit quirky, but only going into strobe and SOS, which I never use. With the head loosened, the "momentary" works well with no inadvertent mode switching (the trick is to depress the piston only half-way). I like the piston better than a clicky, but not as much as the button on the NovaTac.
The EX1o is very nicely fitted and finished. A very nice light, for the price.
The EZs are nice. Both the head threads on the -CR2 and -AA seem just a tad rough, but this doesn't affect functioning. Good warm tints, and a less ringy beam than the EX10 SPw. Both very bright on high and the levels are perfectly spaced, IMO, for a a two-mode light.
My only complaint is that the anodizing on my EZ-CR2 is rapidly disappearing. It's on my keychain and is taking a beating. I thought HAIII would hold up better, but after all, it's still aluminum, and riding around with a few steel keys, in addition to whatever metal most keys are made of (?) it's probably to be expected.
I expect I'll by a couple more NiteCores, a D10 SP and an NDI.