My favorite tool is the June Taylor Shape Cut ruler. I have the 12 inch and Joann's never seems to have the 18 inch in stock when I have a coupon. I noticed that Walmart has a couple of different sizes.
Worst purchase was the pounce marker and chalk. Very messy and doesn't stay on the quilt long enough to get a square done.
Soon I hope to get the large Martelli cutting board, non slip ruler and rotary cutter.
Diane