I would give this album a '5', if it wasn't for the un-inspiring 'live' 2nd disc and the last track on Disc 1 (Woodstock Jam - I love long tunes but not this one). Other than that, the remainder of this album (the first 13 tracks on CD 1) is worth the price of admission.
Disc 1 comprises mainly of leftover material from (Joe) earlier work. However, these leftovers are worthy enough for an album hence, 'Time Machine'.
Tunes wise, 'Thinking of You' is Joe's best tune he's written. It's been my fav of Joes for a long time now. 'The Mighty Turtle Head' and the cover of 'All Alone' are stand outs as well.
I would definitely recommend this album to any fans of Joe Satriani.