I have this and it holds plenty! You can fit 12x12 CM album boxes in the center part, the sides unzip and you can fit your cutting system shapes in there, slots for pens, some zippered compartments, etc.
The only thing would be to really look it over when it arrives. The first one I received had a torn lining when I opened it up; they immediately sent me a return postage mailing label and a replacement bag which was perfect.
Enjoy!