Running on a Specialized SX trail, customised with some Marzocchi triples and a few minor upgrades. Bafang HD Mid-drive, custom made battery pack (16S7P 30Q high current cells programmable BMS).
Ordered one as the "do everything" size ring. I have some monster rings for going fast on the road but they have crusty line-up in the big cogs at the back, so to go off-road with real grunt and great chain line-up, I ordered one of these. Big enough to go quite fast on-road but coupled with an 11-46 cassette and a modded bafang HD (and the battery pack is pretty much overkill) this makes for a powerful but not mechanically unsympathetic beasty off-road too.
The service was quick and hassle-free. and the prices were really good (my Scottish ancestry kicks in when I have to use my visa card). Best prices online for hydraulic brakes with electrical cut-off that I could find anywhere too!
Good job, Luna cycles!