To be fair, they are ALL the same! You won't get much out of any of them - and they can break ANYTHING -no matter how strong, or well packaged!
If you look in the terms of ALL of the couriers, they all state that whatever the damage, they will not be held responsible. There are so many loopholes they give themselves to jump through and pass the buck, that you may as well just accept it and price it into the goods. This won't cover you rear though - so do choose the best courier you can based on performance. An Oak furniture company down here had 90% damage rate on all deliveries this time last year on solid oak furniture that cost them thousands.
Watch how the goods are loaded and look in the van - it says alot about the way it is treated. I have watched driver go into vans with packages strewn all over, standing on boxes that then split open showing car speakers etc. I have seen drivers load vans by throwing boxes of glasses in from above their head - the smash was heard and witnessed. It is wrong, a scam of the highest order - but they have you over a barrel.
One well known company (one of the top names) was sold for a pound....says it all really!
Advising your customers is a good thing - I know many customers have complained to a friend of mine, that drivers will not allow them to check the item - or sometimes even see the box until they have signed for it - stating they are not allowed to. This is a dilemma, as if they refuse it - you get charged again and sometimes a higher rate. If it is returned to you damaged, then they still get away with it.
The drivers state that it is time constraints - but I am sure if the customer were to call the company on refusal to check the item, they would allow it to be checked as it would be faster than waiting for the call to be answered. Maybe supply the customer with this information?
Another thing I have noticed is this; When using any old courier through parcel sites or the couriers own websites, you pay the fee , it gets delivered. When you are signed up to a courier, suddenly you get emails with pictures of the front door, stating they were not in 2 or 3 times and charged £10 for every extra delivery??? Odd! I wonder if this is a subsidising tactic? Were parcels delivered 3 times, every time before? Why not charged extra then? Seems strange....