I really like this set. There's a bit of squawky 50s annoyingness (well, it annoys me), but there's so much gold, it's hard to not find something to love. I use it for blues and lindy hop DJing.
There's a 1952 version of 'Goin To Chicago' (Jimmy Rushing vocals) which is just amazing... in fact, it has most of those classic 50s Basie favourites - 'Shiny Stockings', 'Jive at Five', 'Sent for you Yesterday', 'Down for The count', etc etc etc. Including two versions of 'Every Day I have the blues', one with Ella doing most of the vocal work (with Joe Williams' support) and one with Joe Williams doing the lead vocal.
There's plenty of fast, high energy swinging stuff as well, including a really fun 1952 version of 'Royal Garden Blues'.
The sound quality is just a joy - this is where Mosaic really shines. A massive band doing that wall of sound big band thing, but with dynamics and a lovely balance.
It's just that lovely, fat new testament Basie sound.