I like the Good Vibrations box set mix better than the version on the Smiley Smile / Wild Honey disc. Last.fm currently only has the SS/WH version, even though it's listed in both album pages. The real GV mix is shorter (3:51).
This is one of those unreleased tracks I'm so happy got to see the light of day. It was never fully established into a song, but here we have a superb soundscape with excellent singing and great production that astonishingly was worked on between Wild Honey and Friends, as opposed to being with the SMiLE recordings (which is sounds like). It's not complete, but it's awesome regardless. 5/5