I recently acquired a Lomography Fisheye One. I loaded this with 400 speed film, which seemed to be about perfect for daytime outdoor photos. However, I recommend using a faster film if shooting indoors (even with the built in flash).
The focusing distance on this thing is 4cm, so it’s kind of amazing for self shots – you can even cram a couple friends in there with you due to the wide angle view.
I also love that the lens is visible in all the frames. Rectangles, squares, now circles.