I had 4 hours to kill at CLE and was pleasantly surprised to find a lounge with a one day few of only $20. Typically I would use the USO, but it was closed and there is no DL sky club here, so this was the best option. For the positive - it was early in the morning and the space was really quiet. That was about all this place had going for it. Wifi was extremely slow, food was only moderate at best, and drinks are overpriced as you would expect to find at an airport.
If you have lots of time to kill and the place isn't busy, it's not bad to get away from the airport crowd, but don't expect fast internet or good service.