The sad part is that Google doesn't send any notification when you use this tool. And you don't know when Google is really disavowing those links. I've used it once for negative SEO, for about 100 LRDs. I think it worked great. I saw some improvements in organic traffic.
I don't recommend you to use it, unless you are really sure that those links harm you.
+Daniel Ene These links are coming from "polish systems" - there is no possibility of contacting with their webmasters. I will advice them to cancel "http://" and try again - I think that "http://" can be a problem - Google suggest to use domain:domain.com - there is no signal that using "http://" is allowed.