I dont have any experience with them no. But I am in the process of planning a 3g nano, and am planning to bonsai a mangrove out of the open top of the aquarium, having it rooted to the liverock. We shall se how it works, I am interested to see everyones response here as well... maybe it wouldnt be a good idea in a nano of that size...
But 11? what size is your tank? are you planning on having a small forest under your aquarium? lol.