Endurance

Hi,

I am thinking to add a laser attachment to my 3D printer.
Did anyone have experience with them?! How difficult is to connect and mount them? Is any special software required?

I saw a lot of cheap units on Ebay (Chinese mostly) but I am not sure about their quality.

Checked Endurance lasers web site and it seems like that guys offer pretty good variations.
Did anyone try them?

Thank you?

--Kate alla Tsuba