I've been using these strings for years. They're expensive, but they sound absolutely incredible if you want that bright, new strings sound. They also play amazingly. They are so responsive, and you can just glide over them with ease.
Additionally, although they are almost triple the price of a standard set of cheap strings, they keep that brand new sound for almost 6 full months even with daily use, whereas a cheap set of strings sound dull and dead after 4 weeks max.
In the long run, these strings will wind up costing way less than constantly replacing your cheap strings, and you will enjoy playing your guitar so much more when using these elixers.
TL;DR: Don't skimp on guitar strings. this is one product where you truly do get what you pay for!