I've used the Heat and Bond lite and I don't remember any problems with it. Here is a link that gives good info about it:
http://appliquecafeblog.com/the-secr...tter-applique/ I stocked up on steam a seam 2 when I noticed it was out of stock at most fabric shops and websites and couldn't be reordered. Thank goodness Walmart had enough to restock for awhile. Keep an eye out for stocking issues. This is a big red flag if you use a product and rely on it.