Hey, I'm in Scotland and got mine yesterday. These DVD's are the most well executed in terms of extras and attention to detail I have in my collection. First of all the picture is crystal sharp and the sound is a revelation, the voices actually sound squeakier as if the sound tape has been polished sqeaky clean.
The bloopers are hillarious, watching Jerry, Julia and Jason falling about laughing is as funny as most of the episodes. I was actually shocked to see how serious Michael Richards behaved on set, he really is the complete opposite of Kramer, rarely joining in with the laughs.
The making-of is very insightful, Larry David's contributions are usually the best. Lots of new stuff I had no idea of even as a big Seinfeld fan, lots of backtrack on the battle David had with NBC execs etc. David and Seinfeld's audio commentaries aren't actually all that amazing, there's long periods of silence a-la the Curb commentary on the Season One disc.
Inside Looks give a lot more background on each individial episode than the docu. The Inside look on The Boyfriend is particularly interesting, how they filmed the JFK mock-up etc. The Chinese Restaurant Inside Look gives a lot of info into how shocked NBC execs were with the lack of individual scenes in the script. And living here in the UK, the NBC original promos was very interesting to me (ie: long monologues from Jerry on how Seinfeld was moving timeslots.)
The deleted scenes are usually very short, just a couple of lines deleted from a few episodes, most don't add anything big to the stories.
I won't spoil anymore for folks that don't have it yet, only to say you will NOT be dissappointed, stayed up well into the night last night seeing the most I could before I had to fall asleep. Only wish UK version came with the gifts