It is cool. I went to a Cai Guo-Qiang exhibition (about 2010 maybe) which included Head On and it is amazing. I stayed in the room for about 30-40 minutes checking it out from every vantage point. One obvious part of the experience for me was in looking at it from different angles - walking under the cascade following the wolves trajectory and looking up evoked some surprisingly strong and strange feelings. By far the most interesting part was watching how other people viewed and interacted with it though, with most spending just a minute or two walking through and glancing. I knew I was in for a treat though when I first entered the building because Inopportune Stage One was installed at the building's entrance. That's quite the opening statement for an exhibition I can tell you. 