We have had the previous HC5500 and now have a ComColor - many millions of prints on them. The quality is totally what you want it to be - increase the ink coverage and use the right stock and it can be amazing - but the ink cost can quickly get out of hand on high coverage work in comparison to other options. We do produce some high quality work on it - specifically letterhead where we can use high quality stocks and the amount of ink being used is minimal (thus maximizing profit). Best used for industrial quality, lower coverage work - NCR (number as print merge and eliminate crash numbering and use colour in the design to enhance form) , envelopes (most profitable due to minimal ink), envelopes with mailing addresses at same time as return address (can charge a premium for this due to print merges), window envelopes (no heat in print process), VDP and transactional jobs, industrial manuals, flyers etc. Key is to design to the capability of the machine thus maximizing profit. Only problem is there is no easy way of estimating your ink cost - if RISO ever figures this out - will be even more useful.