I purchased the S1 to try and start a hobby business for when I retire. I love doing tumbler and a little wood work.
This is a great machine for the beginners, the only thing I am not sure of is the atom stuff, right now I am still using the Xtool creative space and I really like it.

I purchased this to engrave black on stainless steel tumblers with my P2S. I had good results with the color changes of my F1, but the CO2 laser doesn't do the same. Just make sure to use the spray within the same day otherwise the coverage may flake off and leave an uneven engraving.

Easy directions to follow and easy to use. Engraving comes out black. Nice product.

First time user. I had a special project, putting designs on stainless pipe. The F1 Ultra did a good job, but my customer wanted the design darker.
Using th spray is easy, spray on, let dry.
The difference was awesome. I use it on many metal projects now.
Rebecca

This is some of the best marking spray I've used for engraving. Just make sure you follow the directions and it won't fail you! Definitely worth the buy.