Instruct: Classify a given review as either positive or negative.
Query: An essential box set

I bought the master takes CD thinking that was more than enough. A year later, I found it wasnt. I just kept listening and listening and could not get enough. These live recordings are essential, maybe in the top 3 jazz live recordings of all time. A lot ot the tracks are repeated, but dont think that this is boring or repetitive. Trane knew he was being recorded, and was clearly trying to make a strong statement, approaching songs each night from a different angle. Eric Dolphy contribution is essential to these sessions. Probably not the best Coltrane to start, but eventually you will need this box set.