Hi Francesco,
as I mentioned before I thought it was sweet... um maybe a tiny bit like coconut & baby/talcum powder?...
I will let you know as it is actually in bud now.
I moved it into bark in a net pot and it has grown well but only has one bud when it can have two blooms from each new growth so that's a bit disappointing.
Might be lack of fertiliser or not moist enough in bark, or something else as I moved it to a totally new area- the side of my house next to the fence that I have enclosed and put all my cool/intermediate plants mostly pleurothallidinae and oncidinae. I might end up putting it back in the sphagnum.
Oh and the stinkyness of B. echinolabium- it did flower last year and I made a post in my blog (that seriously needs some more of my attention lol): with photos
Pleurothallidinae
Regards
Damian.