The S1 arrived in good condition, box unopened. I opened the box and sat down to read the manual.
* The manual does not include a parts list for what is in the box, so there's no way to be sure that everything that's supposed to be included, has been. My package came with the following:
* The X/Y engraver main frame
* The 2.5W laser module with laser protection cover
* The 2mm-Focal Length measurement sheet (a bit of hard plastic, roughly 40x40x2mm, dark color, might be acrylic)
* The power supply
* A USB 3.0 A to C cable
* 4 assorted Allen wrenches
* A double-ended box wrench
* A sample of thin plywood, approximately 100x100x2mm
* Two credit card sized metal blanks (black plastic coated metal, I believe), 86x54x0.2mm
* A lens cleaning cloth
* The printed manual
* A quality control tag
* Packing material
* The first "Using Tip" on page 32 of the printed manual is "Please place the steel plate included in the package under the laser to protect your desktop." There are other mentions of the steel plate in the manual. It's my guess it's not provided with the 2.5W kit, but there is no indication of that in the manual.
* The laser module itself is a consumable, and the manual says that it does wear out with use, however the ACMER website does not offer replacement laser modules compatible with the S1. This may be a problem; there's no indication of the expected lifetime of the laser.
On the other hand, the engraver does work quite well, and I'm happy with it so far.