Wow, I've never seen this machine before, but it is EXACTLY the same as my Singer Quantum L-500! The only difference is the blue color; otherwise, every single button and indicator is the same!
And most of us who have the Singer have had problems with the low bobbin indicator going off when there is a lot of thread left on the bobbin. I solve the problem by leaving the bobbin door open. Then it's not "connected" and the indicator doesn't go off all the time, and you can sew all the way to the end of the thread.
Don't know why I popped on to say that, but it really surprised me. But then again, Pfaff and Singer are the same company now, right? So I guess it makes sense to redesign a machine and brand it for both.