I also use 1PW and agree it is a good choice. I would be cautious with saving too much information and files (documents, keyfiles etc) in it. With their latest update to v8 they removed the ability to print as PDF or save an attachment, so you will have a very hard time getting it out. Only way seems to be screenshot (too bad if the text is longer than a screen) or sharing via mail (you get the draft and from there copy the attachment). Am not sure if they try to hold your data hostage (VC "capture value" play) or greatly overshot on security.
i asked their support and they acknowledged the removal of PDF-printing, regarding attachment: i didnt mean an attached file but the ability to e.g. save a secure note as an attachment. my fault for using bad english. your remark that you can save an attachment via download button is correct.