Quick Question

Has anyone ever bought an unstretched canvas photo and stretched it yourself? If so, is it simple? Is it worth spending $20 more dollars to have it stretched? Keep in mind: I'm cheap. It seems to me that it would be fairly easy and worthwhile but I would love someone's first hand experience before I spend the money. By the way, this is coming about because WinkFlash has all of their canvases 40% off. You should check it out. I'm hoping to get some of my wedding photos printed for me and family members. Let me know your thoughts!!