There IS a difference between Shimano cleats and aftermarket versions. I installed an aftermarket cleat on a pair of shoes, and noticed immediately that there was almost no float. Also, much more difficult to clip in and out. A pair of these Shimano cleats fixed it all. Get the real deal. I will be using SPD style pedals forever.
I've used this style cleat for approximately 25 years and like it. With the purchae of new shoes I thought also time to buy new cleats.
The release is a bit tighter than I am used to with my old well worn cleats...guess that's to be expected. Hope for a short break in period to ease the effort necessary for release.