I will take any troubles that plastic gives me. For starters, the sisal twine is quite a bit more expensive per bale of hay. I have never seen a sisal bale that would hold together before I got it to the feeder. Rodents and insects seem to love to chew through the stuff and if they don't get it, it usually rots off on the portion that is sitting on the ground. Now I do have some plastic twines break before I get to the feeder but short of mishandling the bales, there is always some twine hold the thing together. I realize sisal is beneficial in that it decomposes but it still wraps up on wheels and beaters. To each his own I suppose. I just prefer to keep some money in my pocket all while having well wrapped bales in the hay yard.