Had both my DC at Kingston, with 2nd DC spending a week in special care and I can't fault them. Both births and after care great. Antenatal a bit lacking - had to wait over 3 hours for an appointment and think they are generally over stretched. But would not hesitate to go back there for a 3rd (still working on DH about that one!).
Friends have given birth at West Mid and been equally happy although one did feel the postnatal care a bit lacking but went back there for her 2nd so could not have been that bad.
Parking is MUCH MUCH easier at West Mid - just a thought. I get a sweat up at the thought of parking at Kingston :-)