I had a designer I and upgraded to a diamond a couple years ago. I love it! The size of embroidery you can do is wonderful and the extra harp space is also great. If you do embroidery, the ease of using a USB device vs. the proprietarily formatted floppies is phenomenal. The feet and bobbins are interchangeable. I said I upgraded, but since I wasn't going to get much of a trade in for my designer, I kept it too. I can embroider on the Diamond while I piece on the Designer. I have the original diamond, not the diamond deluxe. Let me know if you have any specific questions.