i bought the vinyl version of this long ago because i was getting more and more into zappas music...but i thought that this was probably a not so good album being from 1969 and all...and was i in for a surprise! First , the sound was incredible! i mean this thing sounds better than a lot of recent rock albums i have heard...also here is the first example of many things zappa would do in future albums, like his totally original way of playing the guitar...also Ruth Underwood first played on this one and it adds that crazy marimba sound to the music which is totally wonderfull...also the writting really starts to get "progressive" with this one...by the way, THIS IS the first, or one of the first progressive albums ever, long before Henry Cow, Yes, etc. or any of those band arrived on the scene. Check it out!