I was looking for years to find such a thin channel to hide the lighting cables above the kitchen counter and I finally found it. The only drawback I can find is its price and the fact that you can't order just one piece, resulting in having to pay for a set of four whether you need it or not.

Very good channel. Initially, it doesn't work at all for angles, etc. It is flexible in only one direction. It doesn't even fit for right angles. It requires extra accessories for connections in these cases. Also, I glued it to the wall and after a while, it fell down with the cable attached. Lastly, I should mention that even its largest version doesn't work for regular cables. They always stick out and don't secure well

The title, description, and features are wrong, I can't know if it's by mistake or on purpose, but it's not 4 meters long by 4 pieces. It's 1 meter long by 4 pieces.

Edit: Revised to 4 stars, both the title and description have now been corrected. It's not suitable for corners and thick cables, but for straight lines and hiding optical extension or other thin cables, it's just fine.