Most importantly, the final product - a softbound book, a print of a PhD thesis - looked fantastic. I ordered 5 copies, it costs around £150, which is reasonable. Highly recommend!
Strengths
brilliant service, easy to use website, quick printing and delivery, great final print.
Improvements or suggestions
you could provide some common options of choosing paper, bound, etc. from all your many options for customers to choose easier what is best for them, like the most common options
In the event you found Copyshop UK with the help of Google, what search key words did you use?
print Thesis softbound (not sure)