Finally someone flower boxes has reinvented for the balcony railing, without the annoying to-install metal clips. The Balconera system is really well thought out and makes the planting and care of a lot of fun. Installation is easy, and with a spirit level can be the holder directly to tune in so that the box is suspended horizontally.
My only suggestion would be to offer other designs for the box - we like wicker actually not so and have only taken into account, because most of the other cases are still a lot uglier. Really great I would find, for example, colored acrylic glass.