I use coco lopez in my coconut cream pie and it is fantastic. But... cream pies can be fickle you can follow the recipe to the T and end up with a runny pie, but if you fiddle with it, it almost always spells disaster. In my opinion, many cream pies call for far too little cornstarch or thickener.
Here is the recipe that I use.
1/2 cup sugar
2/3 cup coco lopez
1/3 cup cornstarch
pinch of salt
2 cups milk
3 eggs beaten
1 tsp vanilla
1 tbs butter
3/4 cup shredded coconut.
Combine the sugar, coco lopez, and cornstarch and salt in a medium saucepan, whisk in milk and cook on medium, stirring constantly until mixture boils. Whisk half of hot mixture into beaten eggs to temper them, add egg mixture back into the custard base and stir until boiling, boil one minute. Remove from heat and whisk in vanilla, butter, and coconut. Pour into prepared, baked, deep dish pie shell. Chill until fully set, at least 4-6 hours with plastic wrap pressed against the filling.
Top with fresh whipped cream and toasted coconut.