Although it costs more, I bought a Juki in 1999. It can be sewn with either 3 or 4 threads, came with several feet, a good manual, and has never been worked on. It is a workhorse & does not vibrate. IMO, most sergers are difficult to thread but with patience & practice, it gets easier. Another important consideration is the dealer and take classes if possible (try the local VoTech adult ed. classes).