I've been to one of these in Oklahoma, which is now closed down so I sorta already knew what I was going into.
Went here Friday night for a charity type event that was packed, on the patio. Unfortunately, my friend and I were the youngest people there and the median age was probably mid '40's. :( Wah. Anyway, the restaurant couldn't control the event goers. What made up for it was the $5 small pizza my friend ordered and shared with me and the $3 Guiness I split with her. The heaters on the patio definitely helped because otherwise I would have bounced right quick.
Happy Hour prices are bomb but the rest of the regular prices are a little steep for what you get. Also, the bartenders are sometimes just not at the bar and are a bit slow (I'm excluding the pregnant bartender from this because she has an excuse.)