I've had mine for over a year now and really like it. I don't think it make things faster, but it does make things more accurate. I suppose it depends on the kind of quilting you do. If you do patterns or blocks that require precision, it's important to cut very accurately, and this tool does help to do that.
It's also very good if you need to cut many of the same shapes. The tool allows you to set your measurements, and you are able to cut exactly the same thing each time.
On the down side, it's a little on the expensive side for a cutting tool. There is also a slight learning curve. You need to read and follow the directions carefully in order to get the best out of your investment. Guess there are no easy answers...