Never buy the economy dropcloth

Let me save you some trouble with the following piece of advice: if you a going to be painting, never buy the economy 99 cent plastic dropcloth at the home center.  The 10'x6' plastic is folded and folded and folded into a tiny 8"x8" flat package, and will take at least 30 minutes to unravel. The plastic is the most delicate gossamer material, floating at the slightest draft or passing breeze. And the plastic is as rugged as a butterflies wings, making it impossible to unfold it without tearing holes in it.