Handling of roll goods has been fully uncomplicated in my 5 month experience. I have been through a range of mid and heavyweight glossy and matte media. I have not attempted canvas of transparency media.
The strength of the Z3200 does not lie, in my view, in its ability to handle cut sheet material. Having said that, I've gotten satisfactory results on letter and super B size papers, with the caveat the centering the image on the paper has involved some trial and error. Further, you must choose from commonly available sizes of cut paper to use the sheet feeder.
Others have reported some mechanical problems with paper transport, but a solution was apparently found in at least once instance:Z3200 Scratches on Print
Although I'm still working to get better print results with some media, I would buy the Z3200 again. Like you, I was influenced by the discount. The only way that ownership has been a disappointment has been in dealing with HP tech support. Other users may well have had different experience, but I have been startled by my contacts with HP support staff. Thankfully, there are good online discussions.