My local Arby's has it for the promotional price of two sandwiches for $4.
I like the buns at Arby's a fair bit. They're more bready than other chains and work well with roast beef. Plus they look nice!
With the Arby-Q, I wasn't a fan of the barbecue sauce at all. It lacks a good smoky flavor and was bit vinegary and very salty. I missed out on a lot of the roast beef flavor because I could only taste barbecue sauce.
I think with a better barbecue sauce (and there are so many out better ones there), I would have liked the Arby-Q a lot better.
Arby's Restaurant Locator
Nutritional Info - Arby's Arby-Q sandwich (182g)
Calories - 400 (from Fat - 100)
Fat - 11g (Saturated Fat - 4g)
Sodium - 1230mg
Carbs - 58g (Sugar - 23g)
Protein - 18g