Alright, so let me do the economic comparison:
ATG Tape from the Tape Depot: $26.99 for 12 rolls of 1/4"x 36 yards; each roll is $2.25...if each roll has 36 yards, that is 108 feet (because there are 3 feet in a yard).
The refills for the Xyron on Amazon are almost $10. That is a little more than 4x the price. I don't think it is worth it for an extra 1/4" of adhesive on the sides. JMHO. But I guess I don't ever have a need for that extra width! If I do, I just put a line of adhesive next to it.