Went to Blue Frog on one of their BOGO days, we happened to be walking by SLT.
Good
-Seating wasn't a problem, we got a nice seat within 5min.
-The sweet potato fries were well cooked, sweet and savoury, about the same quality as I would get Stateside.
-The accompanying salad was nice, well put together and has good flavour.
-Beer: 30RMB (lame, but that's BJ) but it was ACTUALLY cold, which was great.
-I like the interior, the large windows were nice. The bathroom is upstairs, btw, in case you need it.
-Music was nice, good mix of new and oldies.
-Menu is clean, organized, and simple, which was nice.
Bad
-Service was no more attentive than anywhere else in Beijing, I liked it especially when 2 servers had a 5min conversation next to my table about customers in the restaurant, their boyfriends and shopping. >.<
-Serving: Had to tell the waitress 3x that I would call her when we decided, and then our food took forever to show up and was lukewarm. I asked for it to be reheated or redone, and she put her hand on the plate (gross) and told me it was fine. WOW. If I wasn't with people, I'd have walked out.
-The burger: Lukewarm when it finally arrived Dry, massively undersized when compared to the size of the bun, and medium-well meant baked rock hard. I was REALLY disappointed.

Took our time eating, and we weren't bothered afterwards which was nice. Maybe this is because we went on a busy night, when you'd expect a drop in quality, but really? Pick it up. I'll throw a bone and bump it to 3 stars because there's no 2.5, and I'll go back to make sure I don't trash someone unnecessarily.