The product looks great and is easy to work with - overall with the money and a year on still looking great. I ordered 3.4 m lengths and they all came at 3.6m (within the tolerance, but annoyingly a bit longer than I wanted) to eliminate cutting and reduce wastage - in fact there wasn't any wastage. All the hard work is in the building the sub-structure.
One point to note; the decking at 3.4m is quite flexible, heavy and slippery. The 3rd party delivery service was very poor and they had to break open the package and unload by hand - stressful.
Tip, order a bit extra just in case.