As legit as it gets. Not the same high exactly. As SparkSomeChange said, it's a cleaner high, and that also is a big part of the difference in effect. With vapor, at least in the 'clean vaping range' (about 5.5-6 on the 'cano), you don't get the toxins that are released at high temps and with combustion, and those are sleep inducing in the doses you get with smoking, so you retain more energy than with smoke.