There is a famous story told in the annals of food science about the moment when ranch dressing first left Oklahoma. Before then it was a regional delicacy, unknown to most Americans. When they were trying to make a version to sell nationally, they couldn't get it to taste right because some of the original ingredients weren't shelf-stable. They fretted about this for long hours, until one employee suddenly realized that it didn't matter: since no one who was going to buy it had ever tasted the dressing before, no one would know the difference. Whether you think this is a tragic moment or an example of capitalist brilliance, or a little of both, it changed food sales forever.
Nowadays, the nation puts this new version of ranch on just about everything, giving a nice fat, creamy kick to salads and pizza, but especially spicy things like buffalo wings. If you are a vegan but want ranch, there is even a version for you. Instead of buttermilk it uses soy milk; it's sweetened with agave nectar instead of sugar, and the tang comes from apple cider vinegar, mustard and onion powder. Needless to say with a name like that, it's also organic. The company makes a range of organic salad dressings, sauces, and ketchup.
So how does this ranch dressing stack up against the non-vegan kind? Basically if you're eating it on a wing-thing, say the Morningstar farms version, it will do its job of pleasantly cutting the spice fine, even if something with dairy would work slightly better (food science again). Quibbles include the fact that It's too thin, and it's obviously missing the creamy element since soy milk just doesn't have the fat content. If you taste it on its own it doesn't always stay consistent between the sweet and slightly sour elements. One could argue this just makes it taste real, unlike the bland flavor uniformity of lots of other kinds of ranch. Bottled ranch is not exactly a culinary masterpiece to begin with. I would choose this dressing over the low-fat dairy version with no qualms.