Update on everything: visa was approved!!!!
If anyone wants to know what happens at an "enhanced service point", I would really recommend the Reading centre. My appointment was £60, which did include the document check and scan if I needed it.There were maybe three people doing biometrics. We just sat down and waited for them to call out times people had scheduled appointments. The lady we got was actually the manager of the centre. She was really knowledgeable and had a look through all my stuff. She said it seemed like everything was in order, and she reckoned that most appointments finished by noon would get a response back before the end of the day (5pm) if they signed up for the 24 hour service. Not too sure how accurate that is, but it seems accurate for my experience. My appointment was at 11am, and my confirmation email was at 2.50pm ish.
Oh also, you can download your appointment confirmation on your phone, and they accept the QR code from that. I accidentally left my appointment confirmation at home, but the sign at the centre said Sopra accepted digital copies as well.
Now to start studying for the Life in the UK test and saving up for ILR!