Despite several negative reviews, I ordered this set anyway.
I was pleasantly surprised. The quality of most of the episodes is very decent for what look to be mostly 16mm prints. There are several episodes that look outstanding, but most are bright, colorful 16mm transfers.
As noted, episode #6 is missing (a disclaimer about image quality and the missing episode appears on all the discs). While unfortunate, this may be the best we will get and I am willing to accept this release on those terms.
If you're looking for a complete digital overhaul, you'd better wait. If you've wanted this series in a better than average picture quality, buy it. I did and was not disappointed.
Also, I would readily order Volume 2 if it is ever released.