I don't know if their warranty can be 'trusted' or not. Of course if they advertise a 4 year warranty(I didn't read about it, but I'm trusting you did) then they will be in a legal obligation to abide by it.
Their laptop isn't 'the best bang for buck' since the Y510p is pretty close in terms of power for a substantially less price, nor are they selling the latest hardware(3rd gen CPUs and GTX 670), But it hits that sweet spot as there's practically nothing else available which is better than Y510p but not as expensive as an Alienware/Asus G750JX.
That being said, I still wouldn't say their warranty is unreliable. Granted they import things, but since they're a COMPANY and customize Clevo books, they must have some tie-ups with Clevo and other companies where they get supplies from. They will have to fix any manufacturing issues. Its a leap of faith, to a certain extent, I'd agree, but sometimes, when you have the money and you know what you want, you have to take it.
I ordered a custom SkyfireIII from pcspecialist.co.uk. I'll get no warranty in India(I have to ship it to UK in case something happens to it, which will be virtually impossible for me to do) but I know its something powerful for the price and I trust that unless I'm super-mega-crazy unlucky, nothing un-fixable will happen to my laptop.Azom seems like much less risk.