I own an ROWAN 6 and an ESEE 3MIL.
I think you could consider them overpriced, but you'd be hard pressed to find similar quality of workmanship and peripherals.
I've not used their warranty but I'll defer to those here who have.
Aside from the quality and warranty, I think the sheath system is second to none, which to me is important!
The sheath I got with my RTAK II was pathetic and I paid 60 bucks for a MOLLE compatible kydex rig, which made the RTAK package just as expensive as the Junglas.
You get the whole package with ROWAN/ESEE and for those like myself who prefer to buy the package rather than piecemeal it all together, so I'll stick with them; irrespective of the Nutnfancy feud.