Brian May has used Optima (formerly Maxima) strings constantly for both studio and live work.
"As guitarists, and (guitar techs!), we are always looking for a trouble-free life. The greatest thing you can ask of a guitar string is not to have to worry about it. In the Old Days, it was a lottery - sure, many times when you put a new guitar string on, you would get a good sound. But then you would be wondering how long the thing was going to keep its crispness, and if it might be the one which was going to lacerate your hand because its winding wasn't quite finished right, or if it would be the one with a weakness, making it snap in the middle of your most passionate bend! Yep - I used to worry. These days, I don't. Optima strings have such great quality control, you simply do not get duds. Every one goes on and gives you a guaranteed zing which LASTS, until the string is retired because of old age! And the Gold plating - which might seem at first glance to be a luxury - is in fact an economy. The gold keeps those gremlins out and disappointments are a thing of the past."
"Why Optima Strings? No Worries!" - Brian May.
For this set of Optima Gold Strings, the finest laboratory steel is used. In addition the strings are plated with 24 Carat Gold.
This unique combination of alloy and gold plating guarantees full protection against corrosion (ensuring greatly extended life), excellent sustain, perfect intonation and a brilliant tone for far longer.