For HSA inks I look at 1)Color matching 2)opacity 3)Open times 4)Stock . At the current time I have found that magna system works the best for those. We ran matsui since 2009 to the end 2014 and after testing magna made the switch. Again I think it is a preference thing. Today I have found out that virus ink has been in business for 40 years? I only heard about them 2 year ago. I know that magna has been making water base inks for a long time and it seems to be the go to ink in Europe for water base printing because there system is easy and accurate when put to use. I may have to R&D the new ruthland hsa when it comes out and I hope they will sell it to me vs tell me its impossible to print when I have already been running HSA since 2009.