I have used Hobbs fusible batting before, which worked okay. Love the 505 basting spray though. Works well for me, like that it has little to no smell, and it doesn't gum up my needle. I wish I could remember the brand, I tried another one and it gummed up my needle. I ended up having to rip out quilting I had started so that I could pull the layers apart and start over with new batting in the middle. Used 505 for the first time then - no problems with thread constantly breaking because of the needle gumming up.
Like the tip of laying the batting down first, then the backing. I sometimes get some puckering, which is a pain to smooth out. I'll have to buy me an inexpensive flannel sheet and try my bed to baste my next quilt. The floor kills my knees!!