Testament vocalist Chuck Billy spoke in an interview with Full Metal Jackie and explained his thoughts on his bandmate, guitarist Alex Skolnick. He said:

“Alex, since he came back, I knew right away, the first day of rehearsals, that that was the missing element in tone and feeling. That was missing from day one [since he left]. He really does fill that void as far as original Testament sound goes.

Alex is a brilliant -guitar- player. He definitely doesn’t try to walk on Eric [Peterson]’s rhythms, he tries to do his thing, which definitely sometimes inspires some vocal melodies, ’cause Alex is all melodic. It definitely inspires the melody for vocals as well.”

You can listen entire interview from here.