I find this product excellent. I have a Canon IP4200 photo quality printer. I was worried about how these inks compared to the Canon inks for photo quality. I had an 8X10 printed out by a professional and I printed out the same picture using the Rihac ink system. Other than one picture was very slightly lighter than the other overall, they were identical. Even my wife was pleased.
Just some cautions though.
1. When installing the vents, be very careful because removing the plug tends to flow some ink out. It takes more than a few tissues like the instructions say to clean up the mess.
2. Apparently you have to use inkjet printers every week or so, otherwise the heads tend to dry up and you have to do a head cleaning.