Pros : I cut straight lines free-handed for six years, then finally purchased this Morton Start-Up Kit. The entire kit is dead-on accurate, first for fast and easy 90 degree square cuts and excellent for any possible other angle. I was slow to use the break button as well, but now find it easy to use, especially with larger pieces of glass. I use the rubber buttons to prevent glass slippage all the time and with glass that is really slick, the yellow adjustable Morton blocks save the day, preventing any foul cuts. I save a huge amount of time and glass, since I have no mis-cuts, except when I mis-measure. Using the Morton System is easy, quick to learn and if a person cuts very much glass at all, it pays for itself in no time. Did I mention all the little shards of glass I used to get when cutting in a flat surface? No cuts and no shards in my hands now with the Maxi-Surface. I added to the collection with tool caddies for my markers and the oil cup as well. All worth six stars.
Cons : I find very little to criticize in the Start-Up Kit. In fact, the only thing I can truly criticize is that my pistol-grip cutter shaves microscopic shards off of the aluminum bar, which could only be corrected if the bar were made of a tougher alloy, but then the cutter should not have such a sharp edge, so it is difficult to blame the Morton System swing-arm.
Other Thoughts : I teach private classes and demonstrate the entire Morton System in my Intermediate classes. Students comments in almost every class are the same, "Well, I got to have one of these." Personally, I do not know why I went for so many years before buying one. The technology cannot be beaten.