Badaling has really been given a bad reputation for being too "touristy" in the adventure travel guides, like Rough Guide and Lonely Planet. Yes, there are a lot of little shops and stalls. Yes, there are many big bus tours. Yes, it's difficult to find a place where you can commune with the Wall in solitude. Yes, there is a kitschy place where you can dress in a costume and have your picture taken (with a horse or camel, too). However, I hope that given a choice between travelling to Badaling to see the Wall and not seeing it at all, people will go to Badaling.
From the entrance, you are offered two choices of a climb: steep and REALLY steep. I've called this an "athletic" sight because the better your shape, the more you'll be able to take in. We chose the steep side, and I climbed about half-way up before deciding I'd gone far enough to get a good view. Some of my classmates made it much further (the panoramic picture of the wall below was taken by one of them -- thanks, Mirek!)
Having climbed as far as I wanted and taken some pictures, I headed back down to stop in the shops. I spent about $20, and bought Chinese outfits for my three nieces, a cloisonne vase, a set of wooden dogs and a wooden dragon. Bargain with the merchants -- they'll often come down as much as 50% from the original asking price.
Our tour guide dispelled a long-held belief about the Great Wall, which is that it can be seen from the moon with the naked eye. The Great Wall is the only man made structure that can be seen from space with the naked eye. However, space starts 50 miles from the Earth's surface; looking at the Wall from the Moon would be like looking at a piece of string from 100 miles away!
Making a recommendation on this is tough, as I can't help but be influenced a bit by the guide books panning of the sight. If you are interested in a less touristy area of the Great Wall and have the time to travel further from major cities to see it, by all means do so. But do NOT leave China without visiting it somewhere.