I have made over 70 photobooks with this company. The quality is excellent. I have just finished a photography degree, and used photobox for all my printing, books and single prints. Only one book had to be reprinted, which was done quickly, book soon replaced.
It does take time for delivery, so don't expect it to arrive quickly. Its always well packaged. If I have needed to speak to anyone, I have found them most helpful.
I have been using photobox for a few years now. The only negative I will mention is the new studio they use for producing books manually. It's not as good as the previous studio. There are not as many options for embellishments, manipulation or photo editing.
I dont tend to use the auto photo insert, which allows the programme to 'make the book' for you, as I would then spend more time adjusting which photo I want where.