I purchased a couple of New Age Garden Ecoflex Window Boxes to plant a couple of flowers outside my windows and I was initially disappointed with the design, but it appears that they will last a long time. I wasn't thrilled with the side clips because they felt very flimsy and came undone with little force, but after installing another side support clip it feels extremely sturdy. I am impressed with the amount of dirt this planter can hold without bending. I worried that the little drainage hole underneath the box wouldn't be sufficient enough during a heavy rain, but it does a great job of dispelling water at a slow but consistent rate, which keeps the planter light and the flowers nourished. I was also impressed with this planters resiliency to snow. Three to four inches of snow would collect on this box during the winter on countless occasions and it remained structurally sound. I would definitely recommend the New Age Garden Ecoflex Window box because it is easy to assemble, lightweight, durable, and can be customized.