No explanation is necessary. It is sufficient to observe the two images, BEFORE AND AFTER.
First a plastic siphon, then, of course, Syfi.
There is no comparison, Syfi wins by size, by functionality‡ and, last but not least, from an aesthetic point of view.
Don’t wait, choose Syfi! It is installed in 30 minutes, does not require masonry, is inspectable and restores aesthetic dignity‡ to your external walls.