Re: ERNIE BALL COBALT STRINGS
They're okay, they just don't make them or GC doesn't carry them in the gauges I want. Nonetheless I took one for the team and use lighter gauges just to find out. 11-48 Cobalts on my telecaster, and 10-52 on a LTD Floyd Rose equipped guitar. My review for you guys:
How long they last: The wound strings, they last forever IME. The unwound, they take a while to die, and when they die, they DIE. They just become so corroded and rusty that it isn't fun to play on, but the tone is still there. Sound seems to always be there while the feel, not so much for the unwound strings. In short, they last a bit longer than other strings. When they get too gunky, I just boil them.
Sound: BRIGHT. Brighter than D'Addario ProSteels bright, or Dean Markley Blue Steels bright. There is a lot of upper mids, treble, and presence, but the bass is still at least there. Bright, but still somewhat balanced. It also does get picked up very well (maximum output marketing is true) and has a very clear and sparkling sound. The biggest difference in sound is the cleans, which become very crisp.
Availability: If you buy online, ignore. In my local GuitarCenters (including the one in Hollywood), they only carry 8-38, 9-42, 9-46, 10-46, 10-52, 11-48. No 11-54 or 12-56, which you'd have to buy online.
Overall: I'd say they're good strings. For some people, they'll be worth the price, but the only way to tell is to try them out yourself. An improvement to me over the regular slinkies, which I used to use exclusively, until I switched to D'Addario.
Now before a D'Addario vs. Ernie Ball was (I've actually seen one happen), I used to hate using D'Addario because their G strings never felt right to me lol. I loved the tone and life, but the feel wasn't there for that one string. Fixed the problem with a wound G and now that is what I use.