the major drawback is that I can’t trust it. It’s got a “premium” version, and that has always meant a slow steady spiral into “you must pay now that we have you by the balls” situation. Another drawback is that it’s centralized, kill the company and so go your passwords I suppose.
you can self-host Bitwarden if you want.
luckily, from the warrants they’ve received in the past we know that they don’t store metadata, and the only information about the requested numbers that they’ve been able to provide to the court were the date of registering an account and the last time they were online, both in Unix epoch format: https://signal.org/bigbrother/