I haven't got (or heard, aside from the Baker, Du Pre, and string orchestra selections) this one, but in general I really enjoy the design of these Warner reissue boxes. A consistent (not hideous) exterior style, original jackets, very helpful sleeves as you describe. (I find jackets like this especially useful if, say, I know I only have 25 minutes to listen to something and need to quickly see what track(s) will get me there.)
Even better, it seems like someone at Warner is actually thinking how to release these. For years, EMI was mindlessly reissuing the same dozen box sets in endless new artwork schemes, with no difference between them. Now they have established a consistent style, they are including new mastering where possible, and, best of all, someone appears to be going through the archive finding cool stuff. Including from old subsidiaries like Erato and Teldec. One of my favorites is the box of all the Spanish music recordings by Jean-François Heisser. Super handy!
Getting way off track here, but if their reissue producer is reading this, they could do a great Scarlatti On Piano box with Pletnev, Queffelec, Tipo, Hinrichs, Zacharias, Meyer, and Kipnis. It would come in somewhere around a dozen discs.