UPLULA is the one to use. Simple, rugged and they work with nearly any pistol magazine.
Get one for the car, one for the gun room and one for your shooting range bag. You won't regret it.
Someone, somewhere will make accusations about your fitness in general, your sexual prowess or your competence to handle firearms when they seen you using the device.
However, it only takes one range visit shooting in near freezing weather to eventually slice open your fingers on the magazine lips, resulting in blood on just about everything. Remember, unless you are using a really good finish such as Birdsong Black T or similar, you will damage the appearance of your firearm. Now some people like that. However, judging by the large number of folks on here who use power tools fitted with every abrasive known to man to peel off a layer of steel from the face of their revolver cylinders every time they shoot just because they cannot stand dark rings around the charge holes, I imagine that to those folks blood stains are completely out of the question.
I have always wondered if they realize that doing that enough will eventually give your fine S&W a serious case of end shake.
Oh well. . . .