I think you did a very good job.
I like the design, the stitching is nice, the borders are good, the colors are excellent, it looks like it is in perfect square.
I would be happy and proud to have been the person you gave the quilt to. I don't think you can ask for more from yourself. If you had not told me it was your 1st heirloom I would not have known.
My thought is: those who do not have a passion for quilting also seem to have less appreciation for the quilts themselves. I wish so much I had kept the first quilt I made. I can't even remember it now. Would be fun to look back.
You did a good job and I like the quilt.