If anyone of you take lessons, drill on shots, run patterns, etc; this may be for you. Take a look at http://projectionprobilliards.com and take a look at what they've done. I've ordered this and finally have the patterns that I want to play on my pool table. I absolutely hated putting the pattern drills from a paper onto the table and this makes it so much easier. One push of the button and the pattern is transformed or interloped. This is just getting started and there are many instructors that are now putting their drills, patterns, safeties, etc. on here. I think the computer device they carry can handle 440,000 drills, patterns, safeties, etc. so it will be a long time.