Yes, I've done it and honestly it looks UGLY on the back of the quilt. Think about that. I ruined a project thinking it would be fine and it's not. You don't want to see that ugly stitching on the back.

ditto here. i have done it on several small wallhangings

I have done that, but I used a straight stitch all around the edge of the applique. It was more like free motion quilting than appliqueing. I was pleased with the results. It was for a wall hanging.

I am doing that right now. Coming out beautiful

there is a group at a local sewing center that is doing a bed size quilt that way now....I have seen a finished one and it is cool......I have recently seen a work in progress so I was able to see the back side.....the appliqued square is machine stitched using various stitches that are on the machine using a thin batting instead of a stabilizer...then they are sashed, when all are done, they are sewn together another layer of thin batting and then backing and then quilted.....let me add that the blocks that have the batting/applique work are also quilt as you go...each one has its background line quilted, either squiggly, straight, diagonal, whatever, then the iron on appliques are put on, edges finished as in directions with stitches featured as built in on machines and etc.........I would like to try one, but don'twant to "join", would like to use patterns and use my own stash, don't need anymore fabric!!!!! Maybe I will "design" my own from coloring books or pattern books.......maybe, someday.......

I have done this, as many here, but not with a satin stitch. I agree it would be too heavy.

It's all good. I've used outline stitches of a design to quilt the project. A blanket takes allot of rehooping but it can come out real nice.