I only tried the zero sugar style.
It’s quite good, and I will buy it again.
But…
It could be better.
It’s not balanced. The chocolate flavor overpowers everything else.
It could use 10-15% less chocolate and 10-15% more vanilla. The cherry flavor is virtually nonexistent.
I’ve seen reviews where folks have added vanilla coffee creamer or cream soda to it. But when I drink a soda I want to just pop the tab and drink, not play mad scientist.
I still like it, though.
My local Walmart only has it for shipping.
I did try Vernors Boston Cooler, a Michigan exclusive. It was pretty good, but not amazing.
(Erased/deleted sorry!)
…most likely from a central warehouse not local to you 
My Beloved tried the sugared version and loves it. I have yet to find the zero-sugar version in this area.
I saw some at our local Safeway last week. Maybe I’ll try it.
BTW, I bought some Shasta Chocolate Delight(sp?) at Bi-Mart a couple of weeks ago. I liked it, Tastes kinda like I remember an egg cream tasting. Kinda. (It’s been a long, long time.) Chocolate with a hint of vanilla-cream-something.
Had that. Liked that. Bought more of that.
That’s basically what the A&W soda tastes like. It took me forever to figure out what I was tasting, and I realized it was almost exactly like a bottle of Yoo-hoo, which is pretty much a faux egg cream. I always liked Yoo-hoo as a kid.
A friend of mine pointed out that the new A&W is great but only when cold. Very cold, nearly ice-cold. Then it’s delicious. If it warms up at all it doesn’t taste nearly as good. I agree.
I’ve only had the zero sugar version of the soda though, as I don’t drink sugary sodas (and don’t consume much sugar of any kind).