When I first examined these bin bags I was a little disappointed to feel how thin they were. Having said that, I have now used two of them and they did not rip open. They may appear thin but in fact I think they're perfectly adequate for average household use. I did not have to double up the bags, although I'd probably do so if I was leaving them outside on the pavement.
The size of each bag is quite generous. They come in five rolls of twenty bags so I think that will see me through a good few months! The rolls are fairly small which is ideal if you are short of storage space. Knowing that the plastic is biodegradable is also a plus factor if, like me, you are concerned about land-fill.
I would definitely recommend this product. If the bags were a fraction thicker I would have allocated five stars.