Casein Powders?

Has anybody used this to help slow down the absorption/breakdown of protein? I've started an exercise regimen that includes 6 days of cardio (in the AM for maximum fat burning potential) and 4 days of strength training (in the evening for maximum muscle building potential). I'm still pre-op (5-6 weeks to go), but I've already began drinking shakes for breakfast and lunch, a small sensible dinner with protein and greens, and snacks between each meal consisting of 2% string cheese, nuts, and fruits (fruits only in AM to allow time to expend carbs)--caloric intake varies from 1200-1400 a day. However, I was thinking about adding a casein drink before bed time. I was looking at BioQuests Ultmate Casein (http://www.prosource.net/product_details.aspx?item_guid=CFE3CCC4-B3A8-4B24-919B-A559BE16F1D8). Anybody have any takes?