ORRELSE and I were just talking about this. I've had it on tap before, and thought it was great.
I got a couple bottles of it, and it has an odd twang that is nasty. I described it as "rotten orange juice", and ORRELSE agreed. But "grassy" might be apt. Have you ever smelled lawn clippings that sat in a garbage bag for too long, and went rotten? That's about what that flavor is like.
I'm really hoping these are just mistreated bottles, because it tasted just fine to me, on tap.