Well I've been here several times and recently for the two day celebration of U2's 40 years together. The regular exhibits, Louder Than Words exhibit and special exhibits/panels for the event were incredible. Most especially when Adam Clayton Skyped the crowd from L.A.
Never have I had a bad experience here. People that work there love music and have dream jobs and it shines through in volumes when they interact with patrons.
There was an issue when ordering tickets online for the event. My bank account was charged twice and no tickets. Management went above and beyond to remedy problem.