I know it gets said on here a lot, but the difference this treatment has made really is like night and day. I've gone from working mainly with headphones to having a room with a precise, balanced sound, decent imaging, and a pretty reliable low end considering the size of the space, all for less money than you could spend on another mic...
Bit of a disclaimer:
Although I'm competent in the fields of audio and woodwork, I'm by no means an expert in acoustics (quite the opposite!), and I'm sure there are things I could have done better or more effectively. I wouldn't want to set anyone off on the wrong path so I'd welcome any feedback here along the way.
First couple of pictures, from empty space to working room. I'll get started on digging through and uploading the others.
The Room:

The Result:
