I haven't measured anything so is strictly opinion. I Have had 3 prints done through Bayphoto with Xpozer system sold them too. Using a print service it is a cost effective route to go large and be ready to display. I think they would be great for a photography show to show work, easy to hang, more durable than most media and packs easy.
It has a matte like finish, came accurate to my monitor in my opinion. The hanging system is very easy. Though if looking for a completely flat image like aluminum at a given distance from wall you will be disappointed. They look very good and grab a lot of attention if in a area people can view.
I sold the 3 I had so no idea how they hold up in sunlight etc.