I always thought Martin was fantastic, just pushed to the back a bit by Ian being the front man. Plus there is alot going on in most Tull, not usually your straight forward rock stuff which is what makes them great in my mind. But when you really listen in, there is Martin playing some great stuff.
This week was Mahavishnu though (speaking of guitar playing, Johnny is a way top fav!!)
(warning, may be an "acquired taste" this stuff, or require some chemical preparation should we say)