I have an 830 and love it. Learn how to thread it correctly - don't use cheap thread. This machine does NOT like to multi-task - when threading it wait until the machine stops bumping and grinding before finishing the threading. Don't be offended if someone says learn how to thread your machine - there is a method to the madness! Take as many classes as you can - call your dealer and have them walk you through any issues you may have. There is a big learning curve with this machine but you will love it. I've had mine for several years and learn something new every day. Enjoy your new machine - you will have a lifetime of fun with it.