Utopia Texas G19--Have been using a red plastic Bonanza Powder Trickler for years. It works great. Have never tried a spoon, so cannot say definitively, but I imagine that the trickler is much more effective, both in terms of accuracy of powder dropped, and speed of use.
OTOH, if you are well versed with the use of the spoon to get that last half of 1/10 of a grain in accurately, and like using it, why not continue?
You must have very steady hands!