The 15000 is an amazing machine and you will love it. There are lots of YouTube videos, websites, FB pages, etc on line that will help you learn how to use it, if you are new to Janome machines. The manual is also an excellent source. It does beautiful embroidery.
Did you know the lady who had to sell? I can only hope that if I get to the stage that I am unable to use my wonderful machine, that someone who will appreciate it will get it.
Have fun.