I like to use wonderunder.

Yesterday I saw a really neat tutorial showing the Fusible Thread and it worked really neat. I haven't used it yet but am going to purchase some this week to do some appliques's on the tablerunners I am working on. You might check out the tute and see if maybe you would like to try that. I liked the fact that you can separate the bottom to cut it away which takes away the stiffness and bulk. I think it would work really good on circles. Check out the tute. In other times I have used lightweight fusible either wonder under or the other stuff that I call the bumpy stuff for lack of the correct terminology (mind not working today.) Hope this made sense to you.

I really like Shades soft fuse

I'm a Steam A Seam Lite user. Just remember not to use fabric softener with ANY fusible product. It will release from the softener.

Is this right?

With steam-a-seam, I'm never to use oftener when I wash the final product?

I've used steamN seam, heat N bond, and then I was introduced to Appli-kay by Florina it is amazing stuff.

Can one use 505 spray also?

Yesterday someone listed a link for the tutorials on fusible thread. It is on the superior threads website. I think in the future I will use this because it will make for possibly the softest fabric when finished.
Here's the link:
http://www.superiorthreads.com/video...s-fusible-web/

I always use Heat N Bond Lite. I've had only good results, and it's less stiff after washing.

I use a lot of Heat and Bond lite, but I do not like it for quilts that will be used on beds. I think it is too heavy. I like Steam a seam for bed quilts. Heat and Bond is fine for art quilts or wall hangings, purses, etc. :D