I'm thinking of buying some, too. I can't quite picture how you would use them for matching seams and leave them in place while sewing. I sew over the pins that I currently use, very carefully, but can't figure out how I would sew over the clips.
Julie

I bought a box of 50. I make a lot of purses and I use them when sewing the straps. Boy they sure do the job. I hate getting stuck with pins and these don't hurt at all. Your need depends on your projects or your need for them. I am thinking of geting a box of the larger ones.
Ginny

I use them for my binding. I use about 10 at a time, they sure beat getting stuck with pins

How different we all are....hahahaha!! I love them! I have 70 and use them every time I put a binding on. I secure the whole side. Be sure to check around for price. I got a great deal on Amazon on the pack of 50.

Oh NO, you can't sew over the wonder clips. goodness. They are more for binding and such. Precise pinning on seams needs thin straight pins only.

I love Wonder Clips but I got mine from Amazon. Significantly less expensive than my LQS. No more sticking myself or getting my thread tangled with pins.

I use them often instead of pins when sewing pieces together. Mostly they work anywhere you can pin but hold much more firmly.

I won mine on an ebay auction. 100 for 5.00 + shipping. I ended up with three sets. I love to use them on my bindings. I will clip the whole binding, let it set for a day and when I hand stitch the binding the next day the binding lays just perfect when I stitch. Makes the hand stitching go a whole lot faster for me anyways. Seems to give the fabric a memory to lay over and makes the fold easier to make.

I'm doing a project right now and wish I had them. Think I'll check at Joanns soon and use a coupon!

Love mine, bought a box of 50 and shared with my mom and friends. My mom then ordered 2 boxes and gave them to her fri. sew group and her guild. I only use a few at a time so only kept 10 and that is more than enough for me.