The artwork and basic idea behind this is excellent. I made some really good maps with it and the print-quality is very good: at 300dpi it's not exactly photo quality, but is very good all the same.
For small/basic maps the editor works well, but there are a few bugs and the interface can be a little unresponsive if you make a large map with lots of wall/door sections.
I had issues with large maps - everything looks fine when saved, but when a large map is reloaded, some of the squares are in the wrong places, and wall sections are either in the wrong place or missing.
I liked using Shuffler and I'd consider it again for small interlocking space board sections, but for large, complex maps, it's just too unreliable - and the inability to reload some maps after saving makes it 4/5 instead of five.
[4 of 5 Stars!]