I have a needle threader but I don't use it. It seems like the little hook that pulls the thread through the eye of the needle is getting caught on the needle. It only happens at home. I have taken it back to the shop and it works every time. I also have a thread cutter, but rarely use it. I thing the thread is too short and that caused knots on the back. I also like to chain stitch so that makes the cutter useless. I love my machine--a Janome 7700--even though she has a few quirks. lol
Sue