Careful of these 'mega sets'. I have been burned on them a couple of times.
Usually bad packaging or discs that flat out do not work.
TV shows are especially bad for this sort of thing. As they usually have 3-6 dvds per season. Have a show with 10 seasons and that is anywhere from 30-60 DVDs that were made at low quality in the first place.
Sometimes the packaging is good. Others can be hit or miss. One set I bought came in a large paper book and all the DVDs smashed into paper liners. About 1 out of every season was unwatchable. Sent it back and bought the individual seasons for about 20 bucks more.
Luckly the Red Green set I just bought and there was only 1 dud out of the pile. But that turned out to be glue on the disc and came off with a bit of soap and water.
This one looks to be a 3rd generation beta transfer. So expect a bit of grain and audio warble.