I have used the 13s set of this series, so I thought why not try the 12s as well. GHS have played with the gauges and tension and, in my opinion, managed to pull off a set which sound quite even, but does not hurt the fingers. a .020 on the G string (and the fact it is round core instead of the usual hexa core) means you can bend it, which is a big plus for me. I bought two sets, as if I knew I would like them.