I use the original ones. Comes very handy when you are joining
the binding. You know when your quilt is pulling one way when
you're trying to join the binding? Well I just put one of those clips
to hold the quilt together. A clothespin gets in the way...but this
little clip works great.
Also, they make great markers...like "Did I feed the fish today?"
As long as you don't forget to move the marker. :D
I also bought a set of long green ones but haven't really found a use
for them yet.

original for binding, mini for piecing, use jumbo in frequently

Use them all the time, if you make anything using the clear vinyl, leather or silk great because they leave no marks. Bindings are a doddle with them, well worth the cost.

Have you ever been just stitching away and all of a sudden notice blood on your fabric? You have to stop and look for 1. where it is coming from, stop it and 2. how much is on my project and get it off ASAP. Once you use wonder clips instead of pins, you will never have this happen again!
I have all three sizes and use them almost exclusively instead of pins. They are wonderful for clipping fabric together instead of pins. In addition to ALL the uses listed above, I also use them to attach labels to cut pieces of my projects, especially the pieces of totes, bags, etc. Front, back, zipper pocket, inside pocket etc. Use them to clip pre-cut fabric when going to a class or workshop where they want you to bring your fabric pre-cut into specific sizes.
As you can tell, I love Wonder Clips and think they are one of the best sewing inventions in years. Oh and the bleeding issue, I don't have much sensitivity in my fingertips and can get stuck with a pin and not feel it but bleed rather easily, so it was a real issue for me until Wonder Clips came along.

I’ve got generic clips, and they work just as well. Got 100 for less than $10 on Amazon. Worth every penny, and just them for much more than quilting. Multi-taskers!!

For me they’re indispensible for putting on binding. I machine sew my binding and their quarter inch markings and the grip help to keep my sewing “in the ditch”.

I have the original (medium) ones. Love them for hand sewing the back of my bindings. They measure a 1/4 inch when placed up against the edge of the quilt.

I also got the generic clips. I don't use the measurement marks, so I've never been worried if those were not accurate, so haven't paid attention to see if there is a difference there, I just know they hold things together great. And they are much cheaper!

This is the one I bought, but there are also sets that have some of the "jumbo" clips.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

I also like the regular size for bindings among other things and the jumbo ones can't be beat for making bags.

Regular size for me and I will say they are among my favorite notions. I would hate to do without them especially for binding. I haven't seen any need for mini or maxi ones and I make all sizes of quilts.