I just got this in yesterday! Long blade with a very nice profile, very very thin, great grind, very sharp. I usually only use 210-240mm gyuto's, but this one felt right at home in my hands and on the board, probably due to the lighter/thinner blade. Very nimble in the hand for a blade this length, too! I was worried it would be too long, but it feels just fine to me!!
Kono 270 HD Ultimatum with my 240 AS Laser:
I got to cut up a watermelon with it when I get out of work this morning and it did very well! Clean, effortless cuts, no wedging or sticking.