If the shell fits and it's the right flex then it's a good boot for you. However, I find that most people are led astray by the boot liner. Ignore the liner and find the shell that best matches your foot. Try lots and lots of shells. I think I tried everything available until I found that the Head Raptor shell matches my foot best. Get your foot into the smallest shell possible. I believe that skiers looking for a performance fit should strive for the least amount of liner between their foot and the shell. That's what leads to a truly responsive boot fit. If you have a very good fit then you will have good circulation which means you will have warm feet.
I skied in the original Dalbello Krypton for one season when it was first introduced. I found that the shell didn't match my foot well enough and went back to skiing in Flexon/Full Tilt shells. I had tried a number of times to go to a traditional 2-piece 4-buckle boot, but those attempts were not accompanied by an exhaustive search like I went through last season. Now that I've spent a lot of time skiing in the Head Raptor 130RS and B3 RD I can't imagine ever being able to get the same performance out of the currently available 3-piece boots. But that's just me - YMMV. I do miss the easy on/off of a 3-piece though (but lots of silicone spray definitely helps with the Raptors

).
Note that next season Dalbello will have the new KR2, the second generation of the Krypton shell. The new shell owes a lot to the Scorpion line of racing-inspired boots and has a much more anatomical fit. I tried on the 26, but I'm really a 25 shell and those won't come out of manufacturing until next Fall. Nonetheless, I think that the KR2 is significantly improved and well worth waiting for if you're seriously considering the Krypton.