I have been using these poo bags for my dogs for about 1 year now. These are fully compostable as they are corn starch. Don't leave them lying outside though as creepy crawlies do like to eat them. The bags are a good size. They are strong, never had any that burst or leak. They are more expensive than non-biodegradable and even biodegradable bags but these do actually break down in a reasonable amount of time. We have tried other corn starch poo bags that were as good as these but are either half as much again or double the cost. I don't intend on trying to find another brand of poo bag.