Put one on my T3.
It definitely has some advantages such as the grippy surface and adjustability, looks cooler if that helps.
Definitely not ambidextrous,
Added weight to it,
Never changed the results on my paper any appreciable amount (albeit limited rounds) but that could be due to several factors.
Fairly flexible in the receiver area, more so than the original stock and more than I expected.
Overall build quality is excellent as is fit.