Ok, the 4d is a versatile LITTLE kite. That's the biggest drawback to it, it's small. But, it is semi-durable, and has a wide wind range. My son learned to fly with mine when he was really little.
You might consider the Kaiju from Kite Forge, it is a bit bigger. I got mine, but only got to fly it once so far because of all the stormy weather we've been having. If you can wait until I find you at the beach, you could try either, or at least see them if winds are too high for SUL kites.