The stem seems sturdy and good quality. the edges could have been softer, better machined or deburred. The colour doesn't match perfectly the pictures (it's not as yellow as I'd have hoped) and I would have liked black screws - the silver ones don't make any sense, they don't fit with nothing on my bike. 10 grams heavier than advertised, which I find within the limits. I will turn back with details after mounting it and riding at least 100 km.
I've weighted it again, it has exactly 121 grams, as advertised.