I have the Opt Lasers with µSpot and air assist nozzle and I’m very pleased with it. I published my first impressions a while ago. With more experience, what I like:
- material and build quality, mostly metal
- safe: the laser detaches itself and turn itself off it you crash the head in the board. No arm to the laser or… to you!
- air nozzle makes for very clean engraving/cuts, particularly if you place an honeycomb under the board to cut
- they ship from EU, so no problems with VAT/import fees
I have had no problems engraving and, after fine tuning my settings, I can cut 3mm ply in one pass. I use Lightburn and Fusion 360. A recent project.