My call quality is rather good on my Apple Watch.
I’ve answered phone calls while riding my bike. Much easier than digging my iPhone out.
Basically, it is faster to answer a call via my Apple Watch, then it is to answer the call with my iPhone, especially if the iPhone is on a charger in another room.
Also, only the GPS only Apple Watch needs to be nearby. If you pay for the cellular model and pay your iPhone carrier to add your Apple Watch, the iPhone can be on the other side of the world.
Besides, all the other Apple Watch functions are invaluable to me.
Things I do with my GPS Only Series 4 Apple Watch:
• It tells time, date, day of the week
• Every iPhone alarm, appears on my wrist, where you can acknowledge it, dismiss it, etc…
• I like the iPhone 3rd party “Alarmed” app (http://yoctoville.com), for my alarms
• Ring.com door bell can display a static image on the Apple Watch
• Weather (this gets used a lot)
• MyRadar 3rd party app will display radar image
• MyRadar and WeatherBug 3rd party apps will send you weather alerts
• Make/Receive phone calls
• Make/Receive FaceTime audio calls
• Use Walkie-Talkie anywhere on the planet
• Silence phone ringing by pressing the digital crown (great for SPAM calls)
• Send & receive iMessages
• Send & receive SMS TEXT
• Say “Hey Siri, 14 and a half minute timer”
• Say “Hey Siri, remind me when I get home to do xyz”
• Say “Hey Siri, message my wife/husband/Susan/George/etc…”
• Say “Hey Siri, start Outdoor Walk”
• Say “Hey Siri, end workout”
• Use a 3rd party garage door opener app and device (such as MyQ)
• You can check your calendar
• Read your email
• If you need to take an iPhone picture where you cannot see the screen, use Apple Watch Camera app as a view finder/shutter release
• 3rd party Ocean’s Tide app for beach visits
• Hand washing reminder and timer
• Unlock your Mac (I do this several times a day)
• Unlock your iPhone when you are wearing a mask
• Track your exercise and physical activities
Since my Wife got her Apple Watch, we have been able to reliably iMessage each other, as she never keeps here iPhone on her person.
If my Apple Watch was lost, stolen, or broken, I would order a replacement as fast as possible, as I would miss it so much.