Well, for me, the working clases hero has been my summa 140... Bought it around 2005 and still rockin without any problem. I only replaced the cut strip once, 1 or 2 days lost its firmware, and from time to time (years) have to tighten some screws and clean and oil linear guides, head, etc. The only thing I have to do sometimes (maybe once a year or more) is calibrating opos (20 seconds...). So yes, it was expensive (like 10k if i dont remember bad), but only god knows how much money has done this machine every day (even some sundays lol) for 17 years.
I have bought a roland too and some cheapers ones (about 200€), and well... All has their faults (mainboards toasted included), and are incredible cheap for the money they do and the well constructed they are (even the cheap ones)... But those fails on details ruin your days... Bad knife heads that break, bad bearings, bad linear guide rollers, creepy plastic pinch rollers, crappy firmware etc...the rest is good... But the quality on details sucks. For me the summa is extremelly well thought to the details, and those details are 9.8k more...
Ah, and no, i have nothing with summa... I dont have even 1 email with them since never have to do that lol
Btw, only summa is working now. The rest ended in the rubish bin