"I used cete brand for 4 years .....

-Cons: very few stores know this brand of strings produced in Spain. In Paris, if they do not know when ca no .....( you know?)
Personal I have found that in a store in Fresno. Is it in the least.

-Assets:
ITS THE BEST THE BEST KEY and among all the brands I tried (that is, the classics Savarez, D'Addario, ...)
Sound: For the love of flamenco, guitar, Brazilian jazz and bossa: A real treat!
Soft, round, slamming and sweet just right (neither too much nor too little!!)
The hit: same meaning you warm and soft just right (neither too much nor too little!!) (For if it is pretty bad too)
They are not expensive (as few and little known distributed FRANCE)

-NOTES:
The "Flamenco" are heavy pulling.
The non-threaded strings (ie, E, B, G) are black and I think it tastes good but tears and colors ....
Royal classics in the game provided a string G string threaded like the old!! but now they no longer do so (at last count).

-CONCLUSION: Try if you get a chance!!