We have had the "pilot" service at our medical centre for about 3 years now, it was limited to information about the surgery, repeat prescriptions and appointments to start with. They all worked well albeit there was rarely appointments with a doctor available to book online. Our practice manager is really good, he advised that the appointment system is dictated by targets. So they have to hold back so many appoitments every day as emergency ones, a small percent are held back for Doctors who need to see a patient again within a week, only 25% of available slots are released at the start of each month and they are the ones that are put onto the pilot system.
It was however easy to use and meant I could order a prescription which would go direct to the local pharmacy where i could collect it 2 days later.
Then a few weeks ago it was updated to a new version to allow for patient notes etc. to go on. I tried to order a repeat prescription last week, no longer a simple intuitive process but a challenge of mind over app with that line from a TV show "computer says No" coming to mind. There are notes on the surgery website apologising for the inaccessability of the service and also to say that links to patient records have had to be disabled.
Im afraid it looks like another badly managed .gov project and one which will take some time to become properly usable.