I'm a frequent visitor to Atlantic City and Bally's is one of my favorite casinos. I receive frequent mail regarding free rooms and free money on my total rewards card. For the past year, they have offered me $15 weekly and my friend $25 weekly. When i first signed up for their card they offered a free room with 30 minutes of play and sure enough it was true. If you are booking a room just be aware that the rooms in the Claridge Hotel are less glamorous but the rooms in Ballys are fantastic. Rooms are cheap during the week and if you play its more likely that you'll only get a free room during the week. Weekend prices are a lot more expensive but that is the same with every casino.
Ballys also has great places to eat. My favorite place is the noodle place on the casino floor which is open 24hrs a day. With all the comp dollars I have accumulated I have never paid for a meal.
Another thing that I like about Bally's is that it is connected to the Wild Wild West Casino which is a totally different atmosphere. Wild West has a country theme to it and Caesars Casino is connected to it too so you can travel throughout these three places without ever going outside which is a plus if you are booking in the winter.
I have been to other casinos where it is near impossible to get a drink on a friday or saturday night but Bally's doesn't keep you waiting long.
Bally's is also in a great location in Atlantic City. It's close to everything! The outlets aren't too far away and its located at the middle of the boardwalk. There is an amusement park which is open when it gets warm which is probably a 10-12minute walk away.