The product arrived way ahead of shipping window schedule. Took less than 2 weeks. It arrived well packed and fires up but haven’t tested yet but so far excellent. Update: The performance is outstanding and quality is high. 

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Works well and has plenty of power to engrave stainless steel, mild steel, aluminum and more. I have not yet set up the rotary device as I am still learning Lightburn and all it does with this very nice laser. So far I have done stainless steel, mild steel, painted steel and anodized aluminum. Fantastic results with fine details. There’s a competitor offering a laser for, on sale, $3400 (Regular price is $4k) and it’s 1/30th of the power of the ComMarker B4. This is definitely the way to go. No pecking for me. I don’t want to spend all day to do something that the B4 can do in 5 seconds. **I definitely recommend this brand and model.**

So far so good.

 I received my laser earlier than anticipated. I was missing the thumb drive with the files on it. I contacted ComMarker. They sent me an email immediately with the files I needed to get up and going. The pictures attached were my first try at doing a photo on a metal business card. (Second day of receiving) A truly superb machine! I can’t wait to see how far I can take this!I highly recommend this laser and the company.

 excellent support and customer service

Arrived faster than the CO2 laser Im STILL waiting on, every question asked was answered within hours, NOT days. Incredible support honestly. Couldnt ask for more! Maybe just that Lightburn have the same support!

I haven’t fully gotten into my fiber laser but I’ve done enough to know it works perfectly. I have been EXTREMELY nervous about spending thousands on a fiber laser from overseas but this was a very easy purchase. What’s even more outstanding was the customer service. Absolutely perfect. Thank you.

 I’ve been testing this machine for a few weeks and it’s great the price. I’ll attach some pictures and a video to this review. I don’t have a lot of space, so I appreciate the compact size.It works very fast on anodized aluminum and leaves a solid black mark on stainless steel if you use the z-marking method (you can see that on the stainless steel dog tags pictures).The machine is well calibrated by default, but you can always get more detailed results if you calibrate it yourself. I followed the instructions of an awesome YouTube video called “FIX your Galvo Laser F-Theta Lens Distortion with Ezcad Corfile”, the channel is called Laser Everything, and if you are a new fiber laser user like me, this is going to save your life.Costumer service response time is very good, and they were willing to answer all my questions, before and after the purchase, and I did ask a lot of questions.I feel good about my purchase, if in the future I find any problem I’ll update my review.