This is my second Apple Watch, an upgrade from Series 3 GPS Only. I decided I needed the cellular function, and the SE fits the bill perfectly. I particularly like the larger 44mm display, while retaining the same case dimensions as my 42mm older model, which means my old accessories fit the new watch.
I upgraded from a series 2 apple watch. This is my first watch with cellular. I really enjoy biking and running without bringing along my phone. It was also kind of awesome doing yard work with music downloaded to my watch and hooked up to my Bluetooth headphones…lol!