The Hull Breach of Mausritter, this collection is absolutely as incredible as it is beautiful, and a value for the price (physical).  The Mausritter box set seems pricey at $55, and it absolutely IS.  Especially next to The Estate Collection.  You get no less than 10 modules and another one tying them all together in a larger setting.  After receiving The Estate box set in the mail, when I got the Mausritter box set, the core set seemed like a bad value.  All you get is a book, which you can print for free, a pad of paper, a few tokens, and one single adventure.  The Estate Collection blows this out of the water.

My advice to anyone:  Get the free Mausritter manual, print it at home or use the PDF.  BUY The Estate Collection!  Get the physical!  It's incredible how much comes in this little box.