I don't recommend this plugin to anyone. Firstly, as explained by another user in the support forum, it is possible for a hacker to circumvent this and all other plugins of this type if they use Firefox. So if none of the hackers that know this happen to target your site, you'll be fine, but it is highly probable that you will still be targeted by brute-force attacks. You'll get fewer of them, but won't eliminate them.
As if that isn't bad enough, after using this plugin for a while, both the default login page and the custom one generated by this plugin returned a 404, locking me out of my admin panel. I had to manually delete or rename the plugin folder in my file manager in order to regain access. No plugin is worth that kind of a headache, particularly if it isn't even blocking all attacks to begin with.
Aside from all that is the fact that this plugin receives absolutely zero support. Check the support forum and you will easily see that the developer has never responded to anything, ever.
So, if it happens to work for you, great. But it probably won't, and if it doesn't, you will get absolutely no help. Just use a good password and maybe throw in a plugin like Limit Login Attempts or Wordfence or something of that nature.