Fresh or frozen mango works. Fresh mango will provide the smoothest texture, but thawed frozen mango is a convenient substitute. Using frozen mango directly will create a thicker consistency and will require more liquid. I'd recommend adding the lemon juice directly into the blender as well.
Adjust the consistency. If your blended mango mixture is too thick, add a splash of half-and-half until it reaches a smooth, pourable texture.
Use fresh lemon juice. Freshly squeezed lemon juice gives this drink the brightest flavor and balances the sweetness.
Reserving some of the creamy mango mixture makes each glass look extra special when spooned on top before serving.
Don't use ice directly in the pitcher if you plan to store leftovers in the fridge. It's better to serve into glasses of ice. Any leftovers should be skimmed of ice to prevent dilution.