I bought a Pfaff Cover Stich more than one year ago. I had it in a corner of my sewing room and didn't use it. Last month my sister came to visit me for 2 weeks and I gave her a used serger I bought for pennies. She was so exited with her machine that she started using it immediatelly, saw a quilt in 2 days and wouldn't stop talking about it. In the process we both learned how to thread it. My sister left and her gift to me was the exitement to use my serger. I have used it on the last 2 weeks almost every day.
I know that Pfaff is easier to thread than other machines but make sure you put some time to learn how to thread it, once you do it right it will saw very nicely and you will love it. My machine came with a video showing how to thread it, the most helpful thing I used.
One more tip, have it handy and threaded and you will see how much you use it.
Yesterday I saw 3 pillow cases in less than 1/2 hour.