This watch looks and feels good. It has a stopwatch feature where you press the top button and then press it again to stop or pause. When you are done with the stopwatch function, press the bottom button and it will return to the beginning. You'll see those little handles rewind. I've already removed four links to fit my wrist size. If I took another one, it would be too tight. So it's the perfect length that I still have a little wiggle room with. It took me a while to get used to this as I've had Apple Watches for years. But this one is still very nice and a bit heavy. I haven't swum in this watch but I have showered with it and it works great afterwards. As for the crystals, there are clear crystals and then some fuchsia crystals. I don't know exactly what this crystal is and I couldn't find it on their website or anywhere else. They're nice and close there, none of them have fallen off yet. If anything changes I'll update with you, but for now I like it.