Sub,
I just got my TSAF+ in and it makes a big difference with making coils. They are much much smaller joins, cleaner builds, fits easier in the rebuildables and I should no longer have issues with jumping ohms since I no longer have kanthal going down the metal channel which if it moved would change my ohms.
I now fit more wraps in my build, approximately 2 inches of kanthal worth is about 7 wraps, and comes out perfect to 1.5 or 1.6 of 30 gauge kanthal A-1. I definitely noticed a difference in quality of vape as well with the extra wraps. Before I had about the same ohms but fewer wraps because of the twisted join and kanthal going down the metal channel.
Edit: Also, I didn't think my rebuildables would get better, but having joined wires is the icing on the cake for me.