I love sewing gadgets, every time something new comes out I have to give it a try.
The one that got put on the sidelines permantley was the suction cup handle for the ruler.. did not make it past three cuts.And I really thought I was going to love it.
The one I love is the clover bias tape maker... Just love those little, simple tools. Also the big magnet for pins , I have one for each of my different pin types.
Not too big on the Fons and Porter tools... there cutting mat has no lines, there rulers cost more.. some of the special rulers are for only one size square.