I'll start by saying that I have had dim sum pretty much everywhere -- from NYC to LA to Dallas to Chicago and even in Jackie Chan's restaurant in South Korea.
Li Wah has GOOD dim sum. They don't have as many selections as most places, but that is probably why they can afford to keep their food fresh. I've only been here on a weekend for brunch, so I can't speak for the weekday dim sum, but I doubt there would be much demand for it in Ohio so I can imagine the quality takes a bit of a dive on the slow days. It's definitely the best you'll find if you're in or around Cleveland!