I've tried many makes, flamenco marketed string might have some subtle differences, but I change the whole set once a month, and those subtle differences come at a price...
I always try to buy in bulk to save some pennies.
This pack of 3 sets saves some cardboard too, you can look at the environmental aspect of it.
I wouldn't mind to buy reels of these strings, they sound good and never had one breaking in the middle of a performance.
Durable, reliable, consistent, inexpensive...