1Password has really good reputation among security experts, does multiple audits each year, and the secret key feature essentially ensures that even if 1Password were breached, your data would remain safe, even if your master password wasn’t very secure.
Regarding these other options you mentioned, both have issues regarding their audits. Enpass hasn’t had many or even any audits depending on the client. RoboForm has apparently only been audited once, and the report doesn’t give any details about the actual findings, so not very transparent behavior from them.
Both are also using PBKDF2, when more modern alternatives are available and RoboForm’s 100,00 iterations are insufficient.
Regarding RoboForm, I also noticed that their Android app requires a whopping 62 permissions, which is a pretty insane number for a password manager.