I have been using blockchain about a year and I have no issue at all although we ever heard hacking incident.
It's so simple to use it and no need to install at all
I got recommended this wallet by a friend and they said its secure because the server will not know your password
but you will be vunerable by malicious software i have a malware bytes installed and dont really install anything
I dont trust so I think I will be safe in that manner.