I use the Dritz brand a lot , I buy it when the notions wall is on sale for 50 percent of at JoAnns. If I happen to need it before that I use a coupon so it reasonable in cost. It performs well and with the 50 percent off .. its cheaper that other brands.
I used June Tailor a long time ago ... it was awful stuff to work with.. I am guessing they improved it ... but I had found other brands that suited my purposes, so I never tried it again.
I have used 505 but its not readily available locally , it performs well and I don't see much difference between Dritz and 505.