I am partial to Cerner Millennium. I was a Classic user for years before converting to Millennium. Cerner has partnered Wyndgate El Dorado as a donor software solution to compliment PathNet Blood Bank Transfusion. Although the ISBT 128 build was a big project, and I think it is for any system, I'm thrilled with the results. I especially love the interfaced HemaTrax software that generates product labels instantly for modified products.