Its great for purses, not sure about quilts. If I ever get the stuff I need for the 8 bit video game quilt I wanna make, then I will definetly use it.

I have two patterns I got at a quilt show that uses the grids, I was a bit nervous about doing I am glad you showed this, it helps so much!

I am working on a Santa table runner and using the pellon fusible grid - I used it once before for a wall hanging/baby quilt and was not excited to use it again, mostly because the grid is yellow and very difficult to see.

This time I am using 2" squares, but the instructions recommend cutting them 1/8" smaller so the grid will fold easier.
Also I decided to cut the fusible into 2" strips and fused a row at a time, pinned the rows, matching the gaps created by the 1/8" less and I think I am going to like this method better.

I was thinking I could take the stiffness out of the quilt if I used water soluble interfacing and marked the grid myself, then washed the interfacing out after the quilt was done. Haven't tried it yet, though.

I, too, used the 2" grid for a millenium quilt and got along well with it. No way I would have ever had any luck without this fusible backing as I used 2000 different 2" squares of fabric . I folded the backing with the ironed on fabrics along the vertical lines, stitched all these. Then did the horizontal rows with a clip at each intersection allowing the seam allowances to lay flat, alternating left or right. I quilted it using a diagonal line from corner to corner in one direction.This worked out well for me.

Thanks for all the replies! Lots of good input. I did try the hummingbird highway mug mat kit out, and found it a bit tedious to do the initial placement of the fabric on the fusible. It worked great though, and I learned about furling seams to make the tiny blocks lay flat. While I think it worked great for the mug mat, I'm not sure I enjoyed it enough to do it again. I also bought some of the gridded fusible to try out, but have yet to get around to it because I have been busy with other projects. Regardless, after doing the mug mat I think it might be a bit too tedious to do any large projects with it... especially after hearing the reports of how bulky and stiff things turn out.