The E352 Cloud Terrarium seems to be popular for drones, I have seen it mentioned several times in that context. What is it that makes it so good for drones?

-- Exposure

Take a look at ‘Synthesis Technology - E352 Drones N Stuff’, a video by DivKid on YouTube. It's quite explicit.

'On ne devrait jamais quitter Montauban' (Fernand Naudin).
https://soundcloud.com/petrus-major/tracks