I haven't personally seen the newly renovated rooms in Seething Wells at Kingston University, but I've heard positive feedback about them. It's great that the university is investing in updating their accommodations for students.
It's great that you are thinking of living at Seething Wells! I don't live there currently, but when I have visited I have found that it is really nice with the refurbishments and new facilities. It is a great mix of students and so lots of opportunity to make friends while at university. There are also bog common room spaces and places to sit outside, which again creates a sociable environment.