I used to eat it a lot. These days, I like meat that's not aged, and almost all grass-fed beef on the market is aged. It's strong-tasting, certainly - more gamy. Some grass-fed beef is kind of fishy tasting ('cause of those omega 3s).
It's at about the same price point as organic and it's big with the low-carb, primal/paleo crowd, who are huge meat-eaters and probably make up a decent portion of your market.
One thing that's a challenge is cooking it without making it tough. If you can come up with a good cooking technique, you've probably got a good selling point.