I'd be worried with only 70 under his belt. It's a tricky procedure and the results for success is not as high as the nissen.
I had a partial wrap (270 degrees) done and I've have very little problems.
If you have a hiatal hernia bigger than 2cm then you can't have it or your stomach will be pulled into your chest. They stretch your esophagus down some and pinch it to your stomach.