Windows ImageViewer doesn't work great for me. For example, if I want to view images full screen I have to start the slide show and then pause it, which is annoying (especially when I accidentally unpause it). After exiting full-screen, it goes back to the image I started on. So if I just spent the last 20 minutes reading and all the sudden an IM window pops up or I accidentally hit the wrong key on the keyboard, I have to scavage thru the directory to find that image again (I've actually had the manga spoiled for me once because of this). Image Viewer may be good for some other purposes, but IMO its not for manga.
