Saran "Original" is no longer (though you still might see some on shelves). It's now Saran "Premium" a thicker formulation. Though there is some controversy about dioxin migration from plastic when used in a microwave, Saran does not use dioxins in its formula, nor do they use any chlorine. They also don't use DEHA or DEHP plasticizers in the wrap, nor in Ziploc bags (made by the same company). Although only microwave-safe plastics should be used in a microwave (many aren't; the label or packaging material should say so), you can remove food from its plastic packaging and use a glass plate or bowl. Of course, that's not always practical. But even microwave-safe plastic film can melt if it's in contact with food during the microwaving, especially if the contact is with fat or sugar. Film shouldn't touch food during microwaving.
I've always liked Saran's quality. Not interested in the cheap stuff.