Not defending or going against Roland, but while all machines/equipment have their problems, I think a much larger number don't.
Like others have said, ours is a true workhorse and has made us literally 100's of 1,000's of dollars over the years, if not more into millions. Other than routine maintenance, which we don't always perform, I cannot say anything against Roland. Other then their first PC50, their machines are great.... especially for the price. The cost of that machine, maintenance is a drop in the bucket compared to what it's provided.
It's kinda hard for a company of their size to fix each and every problem that comes along. Whether you take responsibility and do it yourself, to make sure your business doesn't suffer, look at all the cars that get recalled. So many things today get recalls to fix safety problems. Not knowing what's wrong with either of the two posters machines, you can probably find tenfold several times over that amount who have nothing but good things to say about them.
As for the OP, keeping a good paper trail should've remedied your problem, but waiting 2 years is a long time to be telling someone their stuff doesn't work and just waiting. Most people today, rather than starting a hate column, would fix it right up front. Just think, though....... had you bought a second machine, you could've made some big bucks, rather than waiting so long. You have to weigh out which costs more..... another $25,000 machine..... or giving up $150,000 a year in prints and cutting ??
This is no place to air your dirty laundry, but it would be nice to know how many times it went back and forth with you and Roland over the time period you are talking about. I would allow for a week, two at most, then I'd be getting in THEIR face, not making a website about them. Sure, you'll get followers, but with more people that don't care if their business suffers from it or not.