A bit disappointing. Tracks 1-3 were recorded in 1973, and 'I'm Sick Of You' and 'Tight Pants' (early version of 'Shake Appeal') are excellent. These tracks have energy and verve, and one can sense the 'Raw Power' album evolving in these sessions. However, tracks 4-11 ("recorded LA 1975") are pretty half-baked. These were never great songs compared to those on the first three studio albums, and the playing lacks cohesion. As for tracks 12-18, the sound quality is poor, barely worth putting on a CD. The recording of 'Raw Power' is described as a 'rough version' - yes. The singing is barely recognisable as Iggy's.
Stooges die-hards will probably like this well enough, and it is not a bad purchase in terms of value for money, but I would not recommend it strongly. Legendary band, absolutely, but (tracks 1-3 excepted) this is a pretty patchy offering compared to the classic studio albums that preceded it. If you are looking for a first Stooges record, I suggest you start with 'The Stooges'.