Customer support can make a huge difference when working with a publishing company, especially for first-time authors. I think the best publishers are those that communicate clearly, respond quickly, and guide authors through each stage. When comparing UK book publishing companies, I would look beyond pricing and check customer reviews, communication, editing support, formatting, distribution, and after-publication assistance. A company that keeps you updated and answers questions professionally can make the entire publishing process much less stressful. In my experience, good communication and reliable support are just as important as the quality of the final published book.