The Great Wall will always be great. You can't get around that. However, having visited the largest visitor area of the Great Wall in China, I was a little disappointed. Before we actually got onto the wall, we had to pass through a tawdry market village with various and sundry cheap souvenirs.
Once on the Wall, throngs of tourists (mostly Chinese) crowded up and down the length, making it impossible to walk at any particular pace. Once at the top, I discovered they were giving camel rides!
All that aside, the view to be afforded from the Great Wall is spectacular, and even if you have to brave the masses, it's worth seeing.
Take a poncho, just in case you get stuck in a monsoon like we did! Also, be ready for a small workout to get all the way up the open length. It can be quite steep at points, and there are a lot of stairs.