I am sorry Bill, which one did you get please?I've been having a blast with the one I got. I really don't know why you would need a demo IMO. They are so simple to use. As long as you have a image and know how to resize, there is nothing else to it. It's drag and drop into the software, check the location of the laser on what you want to burn, and click Start. (of course manually focus if needed)
I read where they will not do plexiglass...well I have done it, just used a little longer burn time.
I'm still testing out the different materials to burn.
I'm not putting down the idea, just saying if you got your hands on one, you would be up and running in no time at all.
I will add that the reason I got one was NOT to do pens. But I can think of no reason to not use it for names ect. There is no rotary so IMO again, that would allow a much better option for pens.
These were just some I had right here...you can see the different conditions of wood and how the images look. It just comes down to getting your hands on one and playing around (I burned the mermaid too much LOL that buckeye was soft and rough)