This is the best of the escape room places I have been to for Charlotte. They have very challenging rooms, so if you expect to win all the time (like I have everywhere else) be prepared to possibly not make it. From the results on the wall (via wooden bottle caps) you have a 40% chance of completing the room.
They need to improve the audio so you can hear what they are saying. That is a major impediment. We almost finished and the new employee spoiled the remaining secrets for us, one person in my party was upset since she wanted to come back and try and finish it, but with all the secrets spoiled that isn't going to happen.