Yes, I have taken out lots of stitches. Work from the backside to avoid damaging the top. I have used the "stitch eraser" which is something like an electric shaver. Just don't press too hard into the fabric or you will cut it along with the threads.
I have a long-arm and the machines can be difficult sometimes. Without warning, the bobbin threads can be very long. I did a practice wholecloth quilt for myself that had a lot of long threads. Makes me gun-shy to use the long-arm machine.
Sandy in SE Indiana