I just love early traditional jazz and of course Louis Armstrong's classic Hot Five and Hot Seven recordings are a must. The sound quality is great, as good as it can be and there is a bit of information about every song (three pages in each little booklet). For the price, this additional feature is quite nice to have, it's not too much, but at least there is some well-researched info.
Louis' trumpet playing is stunning, the solos are simply magnificent and his singing is unique. He set standards in both fields. You can appreciate his talent even more when comparing these recordings with other early jazz formations who recorded some of the same tunes. In comparison, Armstrong's recordings always come out superior, he was simply the best trumpet and cornet player of his time, probably in all of jazz history.
As a drummer myself, my only issue with early jazz recordings in general is that it was very hard to record drums decently at the time. On some recordings, Armstrong didn't even use a drummer, so this would be the only area where these recordings could have been better. Some other early jazz recordings made slightly better use of drums. If only Louis and his Hot Fives and Sevens could have been recorded with modern technology, it would be a dream come true.