Tunze Wavebox, worth the investment?

[Stones]

I was just wondering what all the owners of tunze waveboxes think of this product. I've been contemplating one for quite some time but am still not entirely sold due to their cost and the amount of real estate they require in an aquarium. Some of the nicest sps dominated aquariums I've seen have employed waveboxes, but I've also seen quite a few nice sps reefs that use other means of circulation. Just wondering what your experiences have been. I've also heard that these units significantly reduce the lifespan of the aquarium but have never heard of a tank blowing a seam that had a wavebox in it.