Works with BRU, also GVA, ZRH, most German airports, slightly higher costs for WAW, ROM, MXP.
Very limited dates, though. Early-mid June. Primarily Edelweiss air... but also SN, LX and UA combinations. I booked once on UA stock, once on LH stock.
https://www.google.com/flights/?hl=e...BRU1LX782;eo=e
(for those on the "other" board this is essentially a zero base fare)