He have a dedicated spur. The opportunity arose to install one when renovations were made to the house, and it seemed silly not to grasp it.
There is a ring main socket nearby, so it is easy to compere comparatively "clean" amps to comparatively "dirty" ones.
The difference is more than we expected. In the same order of magnitude as installing a Fraim. The presentation is cleaner. Simple yet more detailed than before. We considered it a worthwhile upgrade. In our case it didn't involve any disruption to the house because it was already in pieces.