Joey's is one of those places that you visit with a small group of friends or on a casual date (although beware because the waitresses tend to be really hot and wandering eyes can get you into trouble). The food is mediocre but not amazing but the atmosphere is really nice and fairly conducive to a good evening. The menu selection is fairly diverse. They don't shine in any one particular thing but everything is fairly edible overall. The problem is that the food is severely overpriced for the portion and quality of food you get (although this seems to be the rule in Calgary).
Also, don't expect amazing service. The servers seem to be there more for eye candy than for actual service. Sometimes this is okay and sometimes this really blows.
I would say that Joey's is one of the better food choices for chain restaurants in the area but if you can venture a bit further than you'll be happy you did.