Make Your Own Art: Instagram to Canvas

I can't take a decent picture to save my life, but my friends seem to take the most amazing photographs. I'm hoping to one day turn their talent into art through one of these services that prints photos onto canvases:

Canvas Pop 

Instacanvas

Snap Fish

A high contender is this photo my friend Beth took of Harlem being blanketed by snow fall:

Or this one of her white fox-dog looking very regal:

Or this one of Manhattanhenge taken by my sister:

Or this one of the Event Horizon art installation taken by my bestie's little sister (actually an amazing  photographer, whose work can be found here):

Has anyone tried one of these services before? I would love to hear any recommendations.