Yes huge difference. I am able to control it a lot better. Doing more controlled moves, not darting as much. It still surges quite a bit in 12 to 15 mph winds. I hang at the edges of the window to keep all that wind off the sail. If it does take off, I let it, to keep the stress from stretching the sail. If my new leaders don't come tomorrow, I'll shorten the bottoms more. Just running out of line!!