I've only had this watch for about a day now. In some cases it meets my expectations and in others it succeeds. There are other things about it that I have mixed feelings about, but I'm sure that as I continue to use it and figure it out those areas of concern will iron themselves out.I've owned several smartwatches in the past including a Ticwatch 2 and a Samsung Fit2. Both I liked well enough, but I found they lacked many health features. I have a Samsung phone and since my Fit2 worked more seamlessly with it than my Ticwatch 2, I decided to keep with the Samsung brand.I'd recently updated my phone from a S8+ to an Ultra S22 Plus. While my Fit2 still worked very well with the new phone, I still had to manually enter sleep and there was no way to measure my blood oxygen. During Amazon's Prime Day, they had a great deal on the Galaxy Watch 4, so I decided to take the plunge.I'll get the issues I have mixed feelings about out of the way first. When I got the watch yesterday, I got it fully charged and paired it with my phone easily enough. Later on while I was playing around with selecting watch faces and figuring out the AR emoji watch face, the watch somehow disconnected from my phone. I was able to get it to reconnect by turning the Bluetooth off and on through the watch. It did the same thing later on in the day while I was just sitting and watching TV and not even touching the watch. Both times the issue occurred, my phone was less than a couple of feet away from me. So I know it wasn't because my phone was too far away. Hopefully this won't be a reoccurring problem. Another issue I seem to be having is notifications that I want to show up on the watch aren't showing up. I've already gone through the notifications settings on both my phone and the watch and set things up the way I want them, but the notifications are still not showing up on the watch. I'll have to play around with it some more.Now, on to the good stuff! It seems to do a great job of reading heart rate, sleep, steps, basic stuff for a smartwatch. I really didn't know what the body composition or the ECG was all about when I ordered it, but I thought, "Hey! This could be cool. Why not?" And it is interesting and gives some valuable insight. However, in order for it to take many measurements accurately I have to move the watch about a finger width above my wrist bone on my arm. I'm fine with that. A lot of other smartwatches that take the same kind of readings work the same way. It would be nice if the smartwatch industry could find a way to take those measurements without the wearer having to move the watch around, but until then those who want to keep a close eye on their health will have to choose watch bands for their smartwatches that can be easily adjusted.Another thing that I didn't really know anything about was the stress measurement feature. I have absolutely no idea if it measures stress accurately, and, frankly, I really don't care. However, I do like that after it takes the reading it offers a built in breathing exercise. I may not know anything at all about how the watch measures stress, but I do know that breathing exercises have been known to help relieve stress and anxiety. They also help people focus and even get to sleep faster. So, having something like that built into the watch is pretty cool!Another thing that I found really cool are all the different music features. Not only can you control music apps on your phone through the watch, but it has a built in mic and a small speaker. So, if you're away from your phone or don't want to take it out and wanted to have a voice recorder handy to make notes or something later, you have access to one right on your wrist. You can also directly download music from your phone to the Galaxy Watch 4 and can listen to music through either Bluetooth connected earbuds or directly through the little built in speaker.As with all new gadgets, it takes some time to get used to them and figure out which apps you really need and which ones you don't, and exactly how you're going to use it. I imagine, over time, the watch and I will get used to each other.