Sorry, I started with the HH6 initially when I did the change from Sky, and after a few days of seeing reconnections and the line dropping, I decided to go back to the HG612+Asus as I was not understanding why the frequent drops.
Thanks to being able to see the details of the line in the HG612 I could find out what was causing the noise issues in my line, and remove it almost completely.
I've been now for 4 days with a really stable line, with optimal speeds and ping. Can't complain how the service performs now to be honest.