I just discovered this venue.. and by discovered I mean, knew about it my entire life and missed all opportunities to experience it until now. I finally saw Canadian legend Gordon Lightfoot perform here last week.
I had bad seats bought at the last minute in the Gallery and at the very end of the ring, basically hanging right over the stage. The view was obstructed by sound equipment and kids leaning forward in the front row of the section but that didn't actually ruin the show for me. Maybe it was all Gord but the whole thing felt like pure magic.
I love the atmosphere of this place. The design allows for a lot of artist/audience interaction. The acoustics were amazing and I like that it doesn't seem like they've made any improvements to the furnishing/decor ever.
It is definitely worth it to pay extra for better seats on the Floor or Balcony if you can get them. Like Melinda said, these seats aren't actually cheap enough to make them worth the risk of marring your concert experience. I left happy but I know the people next to me weren't as pleased.