First impression when I received it was good. Quality is decent and felt reasonably put together. It comes with one modelling lamp, power lead, sync cable, reflector, spare fuses and cover to protect the flash tube when not being used. The version I got is for Bowens S Mount which is the mount for all my light modifiers. The optical trigger has two modes, one will first with the first flash and the second mode will ignore the first flash and trigger on the second flash. This may be handy if you use it in conjunction with speedlite.
Follow this link to see more photo taken from this shoot.
Update: I also used this light as the main light for the Jessica Xavier collection shoot. Click on the link to see the results. It was the main light and I did not encounter a problem for the whole day.
Update 23 April 2015: I was shooting beauty London this weekend and I was surprised to see four Godox DE300 in the studio we were using. When I spoke to the studio owner he told me he is very happy with them and did not encounter any problem. I shot with them all day and did not have any problem.
Update 6th August 2015: I had a message from a reader of this page asking me if I experienced static shock from this unit. I've to say yes after using it for the whole day. I happened when I tried to disconnect the sync cable. At that time I thought nothing of it. I would like to hear from anyone that had this experience. That was the only time it happened to be though.
Update 17th November 2015: I was shooting in the studio using the DE300 with a beauty dish with modeling lamp. After shooting for 4 hours, an error message kept comping up which stops the flash firing. I thought it was a heat issue and swapped to another unit but the same thing happened again after 5 minutes! I can not understand how the second unit can develop the same fault in such a short time. I was using not shooting at an excessive rate but I was using near full power. Switching off the unit and wait 10s did fix the problem for a short time. Maybe it is not a good idea to shoot at near full power all day? I do not know what the problem was and I finished my shoot and got what I needed.