I use mostly the email masking and the form fill. I love the masking as it protects my account from spam and potential hackers. Occasionally a site does not accept the initial masked email but Blur can then generate a friendlier one. The form fill does not seem as user friendly. It's hard to figure out how to create a profile. The app also seems a bit difficult to navigate, but I'm not complaining too much since I generally find it useful almost every day.