Yes, I love the brown border. Very Nice Job. Pretty

Gorgeous- use the brown😉

Brown on all the sides!

I love this design. Is it your own creation?

The way I would stabilize the piano keys would be to measure the middle of the quilt top (going across if I'm stabilizing the top/bottom of the quilt) and use that measurement for my bottom and top border. If you are really fussy you can also take additional measurements at the 1/4 points across and then average the three measurements and use that measurement for your top/bottom border. Then I would mark this border off at either the 1/4 or 1/8 points depending on the length. I would then do the same for the quilt and match the marks and ease in either the border or the quilt to fit and then sew it in place. You now should have a quilt that hangs nicely with no waves and the many seams of the piano keys are held in place by the border. When you use a pieced edge of a quilt as the final edge where you put on the binding it is very easy to get distortion and stretching when you put on your binding. If you have a border strip that is true this takes care of it when you put on your binding.

I vote for brown all the way around. Beautiful job!

Go with the brown. Everything is unified and the resulting frame finishes your work of art. Your friend will definitely be impressed!

Love the top and yes I would put the border on. But add it to the top and bottom as well.

I agree, brown all around.

Great quilt and wonderful colors. Adding the brown border to the top and bottom just finishes a lovely frame all the way around the quilt.