A lot of people said that they thought that last weeks episode was the first time that they saw the inside of Krammer's appartment but I can think of at least two shows where they showed at lot more of the inside of Krammer's pad than a glance in the door. In last seasons closer they show Krammer inside his appartment sort of sneaking into his bathroom with 'a kit' after he couldn't get into a bathroom in time and he missed his 'moment'. Also they showed the inside of Krammer's appartment during the episode where they were all trading keys back and forth. I may have the episode wrong there but I remember seeing the appartment and thinking "Wow. Krammer's place." I'm sure there are also other episodes where they show the inside of Krammer's appartment.
------Despite net opinion still love the Sein!