Very nice planters! I have a smaller Lechuza planter that’s terrific, so have wanted these for my front porch entryway.  
Be aware that these are not 30” tall they are 22.25” high. The 30 refers to the volume, in liters. Check the manufacturer website for specs.  Ditto w other models sizes. 
Also note there is a holeplug to utilize for indoor(plug in) or outdoor(plug removed) use. 
Instructions say that it can take up to 12 weeks for the plant to establish roots deep enough to reach the reservoir, so don’t depend on this self watering feature right away. You water it regularly from the top until it’s ready.