This set has been a long time coming (more than 2 years since season 4 came out?), but well-worth the wait. If you know Mary Tyler Moore, you're getting exactly what you want. Some minor changes to costumes and sets, but the same basic cast (less Rhoda, by then in her own hit series Rhoda: Season One [DVD]  [Region 1] [US Import] [NTSC
The only important comments to add are that the new DVD set is in a single box, without the slip-case, and the big warning is that despite Amazon's statement, this disc is programmed so that it will NOT play in a multi-region player UNLESS that player has been set specifically to Region 1. Set to Region "0" you only see a non-compatability warning. Most multi-region players can be set to Region "1", but we had to find a player which could handle it. If the studios won't put out region 2 discs, people here in Blighty (especially my wife, an American living in the UK) will buy region 1 titles and expect to be able to view them.
We are enjoying the episodes (having solved the technical issues), and look forward to season 6 - hopefully they will get it released a with a shorter delay than that we've had between season 4 and 5...