I discovered discs 1, 3, and 4 of this imported 2004 box set (Proper Records of Kent, England) at my local library. What a find!

Each disc features 25 songs chronologically by recording date and beginning at the beginning - Ella's first studio recordings (Chick Webb orchestra, 1935). 100 songs later, we've arrived in 1952, toward the end of her years with Decca. (note: the Decca album Ella Sings Gershwin is included in its entirety)

Mastering quality is delightful. Clean tracks, do NOT sound like they've been sitting around collecting dust for 70 years! The included booklet provides a thoughtful (if roughly edited) biography by Joop Visser covering the relevant years, with interesting photos and detailed performer credits for each track.

In this digital era, this is one CD product you won't think twice about owning. Nicely done!