'bought a brand new SP-540i and after few jobs, it printed random banding on solid colors (the most annoying fact was it happened like at the 9ft mark on a 10ft long print, ruining the whole job and creating major waste of consumable, cast material and time). Techs never been able to address the problem even after extensive testings so they took it back and offered me an upgrade to the VS-540 for $500 (while actual upgrade was about +$2000). Since they didn't have a crated VS in stock, they moved their demo unit here for the 2 weeks wait and never said a word about the ink I used from the demo. They installed my VS with all sealed ink cartridges and brought back their VS (printer is upstairs in my office... they had to send 2 big guys for the 6 times they walked the stairs loaded...)
That was really kind from Roland to back me up like that. My dealer also stepped at the plate soon in the story. My VS runs fine since 2011. Nothing's perfect and there's "lemons" in each brand. It's how they handle the issue that makes 'em a great company or not. Same for us vs. our customers.