Putting the zip in was a difficult part for me as i had never put on in before, this was an invisible zip, however mine was quite visible, i know understand that with the zipper foot you have to be really close up to the teeth of the zip for it to be sewn. Also at the bottom of the zip was on the outside instead of the inside, i hadn't stopped sewing when i should have done and then sewn the bottom of the zip into the the seams. A lesson learnt for next time.