I have a roof slope of 5/12 that empties onto a 2/12 and I wanted to use metal but due to the advice on this site……(see low slope/metal roof)

All things considered I backed off of the idea of a metal roof. But I needed a solution for the low slope area and was prepared to put 1/2 lap on the area only to find that it isn’t that readily available anymore and looked to find something and was directed to and purchased and installed an IKO Roof Fast membrane on that lower slope and when I went to look for shingles I have been getting all this negative feedback on the IKO shingles. Does any body have any feedback on the ‘Roof Fast’ product itself? Also. are the things that I’ve been hearing about the IKO’s (like the granular surface coming off and curling after a few years) true? What are some of your recommendations for shingles. The color is used for the membrane was weathered wood and seems to be fairly easy to match.