Well starting to say I have A vario6250, and it does not does what pomised... IE.: 1 sided documents....1 sided hight speed 120 ppm. 2 sided yeah 250 a min but in actutal is 125 ppm 2 sided. slowwwwwwwwwww. Stick with the old Docs 6180, 6135 true to there word. Also the Vario eats toner like a Hummer.
Quality is okay, but switching from size media will have your running cleaner sheets 12x18 with the amrkes on the sides of the sheets... cleaner sheets need to run every time you changed media because of dirty cleaner sheets... Oh yeah need to be a rocket scientest to change cleaner sheets and toner rollers and etc. etc. etc. to keep this machine in proper running condition. Anywho, otherwise themachine is great. Don;t burn your hands good luck...