It's good but doesn't sound as anything outstanding to me; this reminds me of the first Deep Purple where they did this same thing with many cover songs. Out Of Focus and Second Time Around are clear favorites to me. I think the band has done some better ones later on.

Its good, good for time when it was recorded and all started, ''Summertime blues'' are one of best and most know songs that this band has performed.
Guitar improvisations here, nowadays such sound can be sludge and stoner driven. Good album.