Never tried bottling wine in plastic. Although...a good way to tell if you have potential bottle-bombs due to incomplete or restarted ferm w/ f-pac would be to fill a small soda bottle with wine, squeeze out all of the air and twist on a cap. If after a week or so the bottle inflates with CO2, better handle the glass bottles with caution! :<
I have used them before for white wine that I consider "pool wine" It won't be around long because I make it available to my pool guests, mostly girls. Also, no chance of broken glass around the pool.