I went here for lunch during the week with some co-workers. I thought BJ's is incredibly clean and the server was really attentive. The interior is fun and the lighting of the bottles on the bar created a really cool atmosphere.
I ordered the Mini One Topping Pizza with a side salad. It was only $7.50 which I thought was an awesome lunch time deal. I wasn't really thrilled, though. It's a deep dish pizza, which is fine, but it just felt so...messy. I ate it with a fork and knife because that was the only option, but even then I didn't feel like I could enjoy it. I didn't know anything about BJ's prior to the day of, but as a chain restaurant it definitely has that chain restaurant food taste. So I wouldn't expect much more than that.
We also all commented on the loud echo in the restaurant. There weren't many people there, but everything reverberated.
I don't drink but there was a massive board with a list of beers. If you're a beer drinker, this really wouldn't be a bad place to go to sit and hang with friends over a couple of beers.