I just bought a new Impressia. I run Macs in my shop & office. But I had to buy a PC (Windows) to run the iQueue software. SERIOUSLY! It wasn't written for a Mac as well. Duh. Just got it hooked up and have run a few 8.5x11 jobs with no problems. Got an order in for 500, #10 regular envelopes the other day. 3 lines of text in the UL corner in black toner. Easy peasy right? Wrong! I'm running diagonal seamed env. and the toner from left to right is light gray, black on the overlapping seams and a medium gray off the seams to the right. Then I made 2" wide strips, one down the left edge and one on the right. Ran a test, the stripes are not solid black. Even off the seams where there are just 2 layers of paper, the image is terrible. Sent an email to tech support. He got right back to me and has the engineers looking at my issue. I emailed photos of the envelope print quality so they could see what the machine is doing. Will hear back from them on Monday. Tech support has been great so far!