Has anyone else discovered these Wago connectors?

This may be a bit of a strange topic, but after years of using connector blocks with screw thread terminals to join cables for things like wiring a light fitting these Wago level connectors are brilliant, and I only discovered them by accident whilst ordering some wiring heat shrink tubing.

http://www.screwfix.com/p/3-way-leve...ck-of-50/76776

If I were an electrician by trade I would be ordering the large Wago installer box with multiple connector sizes. Simple but brilliant idea.