On the plus side, this is the correct size for the screen, is a sturdy piece of plastic film and probably will protect the screen from most scratches and dents.
On the minus side, the instructions are of very little help in getting the film properly centred on the screen. I applied it very carefully but managed to get it slightly off-centre, which made the phone look like a badly made product with a peeling screen. I removed and reattached it the next day and got it centred on the second attempt. However, there are bubbles all around the edges which I cannot smooth out, even with a credit card as advised: the adhesive in those small strips has probably dried out. The film also shows the slightest fingermark as a prominent grease spot, seemingly to a greater extent than the screen alone did. I am probably going to peel off the protector, throw it away and just risk the odd scratch on the screen.
I was disappointed that the product was delivered to me in a flimsy paper envelope with no card or padding of any kind and no instruction not to bend it: the postman bent it in two to get it through the letter box and could easily have destroyed it. Finally, the price I paid here, even allowing for postage, is at least twice what I would have expected to pay for a single small sheet of plastic film, even one that is precision cut.