I've never used it or even seen it in person. I have a little experience with a few other brands and wouldn't spend the money on it for myself. Most of my clients who want composite decking end up changing their mind when shown the price difference between that and treated 2x6's. I never use 5/4 treated wood for decking.
Since composite materials have no strength, you need to have your joists closer together. I do mine at 12 inches. In the grand scheme of what materials cost, a few more joists really isn't significant overall cost. What I see done wrong most often is a lack of basic framing and understanding the difference between a joist and a beam, and then not even using beams. Then they under size their lumber by not looking up span tables for how far you can go from post to post. Then they rely on nails or screws to attach beams and joists to the sides of posts. Fasteners are NOT structural, and can never be relied on to support a load. I notch all my posts and then use bolts to hole them in place. All the load is resting on solid wood beneath it.
Since decking has gaps between each board, massive amounts of moisture gets through it to the soil below. Air flow under the deck is critical. You have to have moving air to dry out the soil, and all your lumber under the deck to avoid mold and rot. Biggest mistake you can make is to block off the under side of a deck. In every deck that I've seen this done, the amount of mold under there is overwhelming!!!!!
If you like the look, and understand that you have to be extra careful not to damage it, and the money is available, then go for it. Just be sure that you understand what is needed to frame it up properly and never rely on the contractor to do it right. In my area, the very worse decks are built by guys who do nothing but build decks. They are fast and they charge less then everyone else. They also don't have a clue of what they are doing!!!