Love a bit of tech - had Garmin cycle computers so bought Garmin smartwatches to keep in the same eco system, nice app, nice looking watches, however, problems with all of them, mainly with connectivity (that also went to the computers) connecting to Bluetooth/app etc was just hit and miss, anyway, persevered for 4-5 years, probably had 4 Garmin watches of one description or another but eventually got fed up of the hassle trying to connect them. Always turned nose up at an Iwatch, too much and dont really like the square look, much prefer the traditional face of the Garmins/Polar etc.
Anyway, after the latest disappointment with a Garmin (Venu, I think, screen not terrible bright like the photos and those oh so familiar connection problems I gave up and ordered an iwatch through amazon knowing I could easy return it if I didn't like it - my God, best gadget I have ever bought and cant believe I didnt do it earlier! Thing is, I cant explain why, other than it just works, all the time, every time. Connects to Iphone seamlessly - watch has even told me that I have left my phone behind in a shop which was pretty useful ("Iphone out of range" was the message on watch I think). I am also constantly loosing the phone in the house - simple press on the watch and phone dings so I can locate it - but there are just so many other uses and I really do find using it a breeze - going for runs/walks etc, again every Garmin took a while to set up, link, and start, the Iwatch, I have the face designed so one of the 'complications' is exercise - one simple press on the watch and everything is recorded - heck even if you forget you get a reminder on the watch telling you it thinks you are going for a run do you wan to record it etc etc etc
As others have said, the charging also put me off initially, but its really no effort at all - obviously smart watches are not for everyone, and the Iwatch is not for everyone but I really do love mine surprisingly so and would replace it in a heartbeat if it was lost etc.