For Bee Gee fans, this is a must have disk.  The 3 brothers are there, front and center.  Unfortunately, the falsetto or high note that the oldest brother has to hit for many of the songs is hard to do and he fails more often than not. This is not a major problem, as the Bee Gees are basically a harmony-brothers type group, and they achieve harmony on every note.  I mention it in passing because purists who are used to studio productions, where acoustics are better and, more importantly, takes and re-takes are possible, might think these songs less than perfect.  They are, but that is the trade-off we happily make to see a concert recording with live production.