The YouTube reviews over-celebrate this one. Photos are dark and I was most excited about the double exposure but all of mine came out so you can barely see what the two shots were. Going to try the Instax instead.
Important to note: after taking picture, wait 5 seconds before removing from camera. After that you must either turn photo upside down for at least 15 minutes or place in the dark for 15 minutes. Will up your photo quality by 50% at least if you follow instructions.