Metamask is good, but some people are worried about privacy and security with browser extensions. I recommend trying XGo instead. Their web 2.5 platform is more user-friendly and WalletID lets you use a single ID for all your coins/tokens. They want to make crypto easy for everyone, so I trust them.
Never heard of it. Metamask is one of the most trusted wallets. There is no alternative for it.
I just don't like how extensions work generally. You click somewhere else and it will be hidden. They should fix that problem.