I don't have any experience of East Surrey, but I can tell you a bit about the Pruh.
Newish hospital, pretty clean and reasonably well-equipped. Delivery suite is relatively small, with about 9 delivery rooms including one room with a birth pool. All delivery rooms have small bathrooms with shower, loo etc. Postnatal ward is quite cramped if you're in a bay, but they do have private rooms (again with shower/loo etc) you can pay for at approx £120 per night.
Staff-wise, well, they have the same problems with understaffing as anywhere else, really. Postnatal ward is often understaffed as far as midwives go, but they do often have nursery nurses, HCAs, student mws and even general nurses on duty. Sadly the mws are usually too busy to give enough time and attention to mothers struggling with breastfeeding, for example, but the breastfeeding advisors should be on the ward every day.
Re: visitors - delivery suite allows two birth partners who obviously can stay with you throughout. Postnatal ward has strict visiting times but does allow limited family in the afternoons/evenings.
It is a consultant-led unit, fairly 'medicalised' and the section/induction/intervention rate is higher than it should be. If you have any specific concerns/requests then writing a birth plan and making sure the mws read it is always a good idea! It is possible to labour and/or give birth in the pool but it's a first come, first served thing and sadly not all of the mws are confident in waterbirth. At the other end of the scale, it has a 24-hour epidural service. I'll leave you to guess which one gets used most often
As weasle said, it is a nice unit, beset by most of the same problems as anywhere else. As a rule, the mws are completely lovely and work damn hard. I think that the vast majority of women who give birth there would say it's a positive experience.
Have a lovely birth! HTH