I agree with HappyKamper. I've owned an Eezi-awn, cvt, and currently a Maggiolina.
There's an obvious difference in quality with the cvt compared to the eeziawn. The materials used with the eeziawn are much heavier duty including the tension rods that hold the windows out. The cvt's are half the diameter and thus keep much less tension and so more flopping in wind etc.
That being said, the cvt functions fine and for the savings, may very well be a better choice. I use mine so often it's worth getting the best quality.