I've done Optifast and HMR. HMR is delicious, Optifast is horrible. To make the shakes more palatable, my husband and I bought an arsenal of Torani syrups. My favorite was vanilla shake with vanilla syrup, his was chocolate shake with vanilla syrup. My best friend did it too and her favorite combo was orange shake with Crystal Light for flavoring (that was my second favorite). You may have a different taste experience than the three of us. We all completely hated the taste of the shakes alone. The formulation that we had was Optifast 70 which only has chocolate, vanilla, and orange flavors. Since you have strawberry and not orange, it sounds like you might have Optifast 800 which I hear is a lot tastier than Optifast 70.