Good job. There are always errors if you look hard enough, so don't do that."perfection is highly over-rated", says my friend at the LQS. YOU are not a machine.
Nobody told me that it was impossible until after I had quilted about a dozen quilts from twin to king sized on my home machine. It's much easier now that I have a Janome 6600, which has much tighter control than the Bernina I stasrted with and also lock stitches, pulls the thread to the back and cuts it. That's not to mention the greater depth, which is why I went with Janome in the first place.