Ok i've been back at work a bit now an d i think i can see the issues they were talking about.
The users try to log in and sometimes it seems as though the login window just freezes.
I have checked the caches on some of the users home dirs and all seems fine.
Interent is quite sloow though and has since been migrated to a school guardian installed proxy acting as the gateway.
Garageband is still working fine though. Which was my main concern as we have a visitor who comes in and teaches the kids music using the app.