It depends on what good enough means. Most of us sew to relax and make something we can be proud of. If good enough means many areas that are very obvious, then I could not live with that. I have been quilting for only 5 yrs. I had more mismatched blocks. today I have to rip it out, it does not take that much time and the results are worth the effort. There are some ways to cover up small errors with appliques that fit in with the overall theme of the quilt. I am not a perfectionist, but want to feel good about my finished product.