Great place and worth the money, the wife and I caught Spiderman 2 and Men in Black 3 and the picture was perfect; not sure what others were complaining about. As for the sound, it's an FM broadcast, so for those people complaining about sound, it might be time to upgrade from your ford pinto to a better sound system.
As for the price, $9 for 2 movies, in any theater today you're paying 15 for 1 movie. If you want to bring in food then just pay the fee, theaters really do survive on concession sales, which is why Drive in's have all but disappeared in the US. Cleveland is so fortunate to have several options for drive ins and it would be a shame to lose them. Personally I always plan to eat there because I want a place like this to be around for my kids. I love this place and if you want a taste of nostalgia this is the best way to see a movie on a cool summer night.