The L4040 is a great laser engraving and cutting machine with a good price/quality ratio. The shipping took longer than expected, which was unfortunate because it arrived too late; it is a birthday gift. The problem was not caused by Vevor but by DHL, which made mistakes twice. I contacted Vevor, and they responded kindly within a day and reached out to DHL. The manual is poor and contains a few small errors, but with a bit of logical thinking, I was able to assemble the machine in one hour. The L4040 does not have Wi-Fi, so it cannot be used with a mobile phone, but this is mentioned in the description. It takes some trial and error to figure out how everything works, but it goes well. I have already cut and engraved 0.5 mm balsa wood with it. I also conducted tests on leather and cork, which all went well. The L4040 is an inexpensive machine that shouldn't be expected to do too much, but it is certainly suitable for beginners or as a gadget. I definitely recommend buying it.