This my first large print from my Nikon D40. It's 20"x30," ordered from Mpix. I ordered it mounted on double weight mount board. The print quality is A+. Even up close the quality of the image looks great.I bought the metal frame at Hobby Lobby (the kind that sides comes in different lengths so you can make whatever size you need). They cut the glass & another backer board. I was out of there quick and inexpensive in a matter of minutes.
I took the picture by my back steps and input the text using Photoscape, a great FREE image editing program. Get the Faststone add-on program to add text, batch, watermark etc.
There will definitely be more large prints in my future.