I won't review the original album which is great and like so many other Rafferty albums only continues to grow on you the more you listen to it.  On this 'Collector's Edition' the mastering sounds great to me, and on CD 1, in addition to the original 10 tracks we have a track 11 "Big Change in the Weather (B side of the single 'Baker Street').  Then for the real bonus, we have a CD 2 with 8 tracks of demo material that is all top form stuff: