The pendant is beautiful. The 4 quls are my favorite surahs and hold a lot of meaning to me. So I love it. I have this in gold as well, but I wanted a silver one for when I'm wearing silver. I wear it almost everyday with no tarnishing or any other issues.
The only issue I have with the necklace is the length. I have a small neck and petite frame in general, so I need the lowest setting ring for it to fit my neck. Even on the lowest hook the pendant hangs very low on me which allows me to layer at least 2-3 shorter necklaces with it. The biggest problem is that the tail then dangles on the back of my neck obnoxiously. I've learned to clip it on a second time at the end hook (which would be the hook to set it to the largest length) which shortens the dangling on the back of my neck significantly. It would be nice if there wasn't so much extension on this necklace for those with smaller necks and frames.