I bought the panniers in order to carry equipment and clothes on the C2C (coast to coast) cycle ride.
First of all, they are by far the cheapest panniers per litre (28) storage I have found anywhere.
They are light, very robust and shower proof - I did a bit of cycling in monsoon type conditions one afternoon and found that they were not waterproof, however they do not claim to be so.
One of the other reviews mentioned that they are not easy to remove from the bike. They attach to the bike pannier rack via six ties, rather than clips. I did not find this a particular issue, in fact it made them feel more secure on the bike and with a touch of practice you can remove them in two minutes.
Overall, for the price, weight and how well made they are, I had no alternative but to mark them down as five stars.