I would love to save my strength and my thumb for something else, so yes I do use the Uplula and I only get 10 round magazines in up here which means I go through a magazine a bit sooner comparing to those who live in the free country.
I use the UpLula as well. For me they fit into the same category as a microwave oven, remote control on a TV, or a backup camera on a car. Once you have one, you'll wonder how you lived without it for so long.
I will say that when shooting my Rock River Arms 9 MM AR Carbine, trying to load the 32 round magazines without a UpLula is a lesson in futility.... And very sore thumbs.