Tried them all, I liked MG Chemicals, but went back to Kester EP256 63/37. I buy from CML Supply it seems to be fresher because they sell a crap load on Amazon/FleaBay and in my experience it flows a bit better/faster/cleaner with a hot air/reflow station and last longer, IMHO, it was $17.99 free shipping 3 days to the door, usually.