I always have (and probably always will) have a love for the great and even quality of D'addario strings. Their sets are fantastic and their single strings, like this one here, are just beautifully balanced with the right tone to it.
Though, I wouldn't buy theese from anywhere else but Thomann because of the packaging. Unlike their string sets which are all vacuum-sealed, their singles are not and are prone to oxidation if they sit for too long in storage.. Very common in smaller stores where the demand is different. SO, great strings, but I recommend to buy theese from a bigger retaliler like Thomann because the quality and freshness is going to be much higher in the end, making it less of a risk to get a dud string!