I got mine a few weeks ago. I haven't been very impressed with the sonics. American Beauty is much better on DVD-A.
The first two albums, Grateful Dead and Anthem of the Sun, seem a little dull and lifeless to me. Aoxomoxoa isn't much better. I haven't listened to Workinman's Dead yet.
Still, it's nice to have these on LP. I have Workingman's Dead and American Beauty on CD, too, and they're lackluster in that format.
Get the DVD-As of American Beauty and Workingman's Dead if you can. The box set is probably worth having since you can't get the first three albums in high resolution digital.