I agree with you and would include most or all Chromebooks I've experienced on that list. My experiences include the Acer C720, the Acer R11, the HP 11 (the white version that was recalled) the HP 14, and the original Chromebook Pixel laptop.

Maybe the HP14 was not quite as great as the rest although I think it was fine, while the Pixel experience was exceptional. I don't think it's a matter of a specific one, I think it's generally across the board a very solid to good experience.