no problem from adamaster
a cardon diffuser, good material, could be better in the finish but very nice (i filled a smole hole in the fiber, nothing serious.
shark fin in CF, i had to remove it, that's not adamaster's fault. it seems that in Europe the antenna is not emiting so strong as in the US, so my GPS was fully lost and going crazy in all directions.
mirror covers, very nice too, thin like promised. fitment very good, but not perfect.
but how ask perfection for something thats costs 4-5-6 times few than BMW's parts ...
so i would say, buy in confidence