I have already used 3rd and 5th generation smart watch.
• G pay doesn’t work and gets disappeared after update it only works in 7 countries as of now.
• Whenever I recieve a call on watch the voice breaks almost every time. Voice is not clear.
• Google assistent does not give messages in voice and don’t respond to ok google after turning it on in setting.
• Their are very less useful applications. It has very less content.
• Fosiil gen 5 it has to be upgraded its doesn’t allow some apps to work it is based on old models but battery backup is good.