Ok, I've not had a bunch of experience with basting spray. I've only used it on 2 quilts so far and the first one, I basted, plus pinned. The second one (my current project), I sprayed very lightly and did not pin at all. I've twisted and turned it every which way in the machine and it's still holding strong. I have the June Taylor and it does require ventilation. I am actually surprised though at how well it's held with very VERY little spray!