Have used for almost a year and no hiccups.Arived extreamlt well packaged and worked practically out the box (apart from conecting water pump/reservoir and exhaust). *shall mention onlt deionised water in the reservoir to prevent damaging the laser tube*Id advise researching b4 buying as there are a few minor problems present in all these lasers, however they are easy to remidy. Mainly,Earth/ground- most important, screwd onto painted metal, just unscrew sand and replace to get good contact.Wires in extractor fan- not properly insulated, also qick fix.Exhast flue- waste of time, got a cheapy 6m for _3 localy.Cutting bed- Made my own but can buy hight adjustable ones too.AndSoftware- never bothered with it. Use inkscape to draw up svg's and prosesed them with k40 wisperer all free open source software.I also got a cheap airbrush compressor to act as air assist and printed a nozzle, this prevents fires and damage to the sensative laser lense.I knew what I was getting and so far continueing to enjoy using it.