I'm the same as you Steve32k. I never used a speed loader at all until last year I bought a 15 round mag for my M&P 45. It was fine until about the last 2-3 rounds and it was painful. arthritis was acting up and I could barely move my right thumb. There was a guy next to me loading mags as he had just arrived and pulled out the Lula and loaded 6 - 15 round 40 cal mags. I borrowed it to load the mags I had twice more and that was it for me too. Off to the store and bought one for myself and both my sons. We never used them before, but they are great as far as I'm concerned. I come to the range to shoot, not stand there and load magazines. Every little bit helps.
And it does work for the M&P Shield 9mm. I use it for that also. I keep it around my neck on a small lanyard so it's right there for me. Time is important!!