Show me something that beats a natural 20 and I'll show you hateful lies.
Some of us do not want to put two mats together. As I do not play x-wing I wanted a mat that was the entire size of Armada's playing field. Depending on the prices in the UK, this may be cheaper than two FFG mats as well. They MSRP here in the States for $40, making it 80$ for two plus tax. My total at something geeky was around 60 for everything I believe at that time.
A lot of the 2nd market mats are just vinyl or plastic mats though, you can get those done up large in print shops yourself as well. Just need the image, cheaper.
I don't play x-wing either, they are still rock solid (and don't get over huge).