I'll chime in with some recent experience, since I just used Studio's Print to File function for the first time.

Staples was (and perhaps still is) having a half-price special on prints 18x24 or larger...$12 instead of $24, so I decided to give it a try with one of my close-up flower pictures.  Decided to take the file out to the local store rather than uploading.  After printing a test strip, decided to settle for an 18x24, although quality would have been acceptable even in a larger size.

Qimage took my 2.8 MP 3264x2448 file from an 8 MP camera and turned it into a 19.8 MP jpeg which Staples printed with no problem.  The resulting print will knock your socks off, even if you're holding it in your lap and examining it as closely as you would an 8x10.  What a great program.

GeekDad, I was shooting with a Mavica when I first got Qimage.  It does indeed allow you to get an acceptable 5x7 from those 640x480 Mavica files.

Those were indeed the days.  Every computer came with a 3½ floppy drive, and the Mavica was the camera to use if you were selling on ebay, or doing anything where you needed to get a photo on the web asap.