I've used BMF masks for a while now, and would be hard pressed to go back to anything else.
Yes they can be a mongrel to remove, but I use a toothpick that has the tip dipped in CA and then filed to a point.
It is strong enough to get under the foil and lift it, but has enough 'flex' not to scratch the canopy.
I haven't found any other mask that has given me crisper frame lines than BMF.
I also paint all the canopy sections off the model, and attach them last, even the wind sheild, but I always dry fit the wind sheild to perfection so all it takes is a drop of CA to lock it in place, with little to no seam.