Nope, only the grippers. I have recently been using grenade balls to do all my curls, but that's really more for novelties' sake. It gets me to do curls, haha.
I can pull singles with straps as comfortably as I can without. It took a while to get used to them, but once I did it worked out well. It also got me to stop fucking around at the start of the pull and learn how to just get my air and go.