I used to use D'Addario XL's, began using other strings, came back to them and left again on my never ending quest of string tone supremacy. I am happy to say that I am using D'Addario again. Like many on TB and in the bass world balanced tension string sets appeal to me. I wanted to try them and had some concerns I posted in another thread. I decided to go ahead and give them a shot though and ordered a set (the .33 lb set Jason built for me out of singles) from http://www.basstringsonline.com and I put them on my recently acquired Valenti STJ5 All I can say is WOW! These strings sound killer and they feel even better. The lighter gauge feels great (I was worried about this). I also like that D'Addario extended their standard sets a little bit because my Valenti is a 35 inch scale and they fit perfectly! D'Addario really seems to be a great company and their rep on the forum Don Dawson is awesome and helpful. D'Addario listens to the bass community and for that I am thankful! I really love these balanced tension XL's! Thanks D'Addario!