About my S4: It offers great response, a full sound, is 124 grams light, and I really like its elegant look. It is also extremely sturdy and "Estrapades", the stick hitting the fingerboard, something that is quite usual in Tango, don't bother the bow at all! After a week of familiarization (which is extremely important!) I sold my wooden bow, which had cost twice as much. Worth mentioning is also the nice contact with Mr. Muesing, who let me have a variety of bows for trial. Thank you so much!