Pros : I debated for a long time on what system I wanted. This went on sale enough to cover the S&H. I really like it. Yes, as some other reviewers have mentioned the directions are not great. I am mechanically inclined, so I found it easy to figure out. It's well made. Making repeat cuts is great. So much faster and more accurate.
Cons : Easily rectified issue is that w/ the four grids it takes up a lot of space. When I was cutting smaller pieces the ruler and tracking arm length was an issue when I used only two grids. Delphi didn't carry the shorter track bar and ruler that go with the smaller set for separate purchase, but I found them elsewhere.
Other Thoughts : This is fabulous if you have to cut large pieces of glass. If you primarily work on smaller pieces, then space wise I would recommend the Mini Beetle Bits system. Same quality and components but with just 2 grids and the shorter bar and ruler.