After cutting glass by hand using the score and snap method for 6 years, I finally purchased a Taurus 3 Diamond Ring Saw. I absolutely love it! Obviously, it is now much faster to complete projects, but I also love that I can cut more complex shapes than ever before.
The saw came with a very entertaining get-started video, and it has many features I haven't tried yet. I've only used it in the standard configuration to cut single sheets of glass and haven't tried it as a hand saw or purchased any of the special blades yet. To the left is my very first cut, made from one of the sample patterns at the back of the instruction book.
I'm really loving it as I am getting into fusing now, I must have cut out 3 or 4 dozen pendant shapes in short order over the past two weeks. It's especially great for cutting circles - it would have taken me forever to score/snap all those circles but it was a breeze cutting them out w/my new saw.
It is very wet to work with, and the glass definitely takes a bath. I'm used to marking where to cut with either a Sharpie or by glue-sticking the pattern to the glass, but both of those can come off while cutting if you're not quick and careful. I've found that if I let the Sharpie ink dry for ~60 seconds it's more likely to stay on long enough for me to get my piece cut, but not always.
You can also use the saw as a grinder to grind away the rough edges, but I'm not doing that. The blades are expensive, so to save mine I'm still using my normal grinder after I get the rough outline cut w/the saw. And I do still score/snap for straight lines and simple cuts.