I did that for 6 years, raspberry. 
I think it went well today. No one from the LA came, though! First time that's happened in 11 annual reviews.
The old statement reviews used to have a section about whether the provision was to be maintained/reduced/increased but the new EHCP review doesn't seem to have that section.
The college send off the paperwork to the LA and they make a decision based on that. Interesting.
I had a bad experience last year at the transition to an EHCP when provision was reduced by 5 hours without any discussion and after a battle via email and phone they grudgingly gave one hour back so I'm not expecting good things this time.
DS2 seems to be doing well, though, with the current level of support. It was nice to meet one of his teachers and the HO computing department, his learning mentor and the autism coordinator (specialist senior LSW.) They told me his target grades for this year (DM) which seem suitably aspirational, and a report is due out by Christmas with a parents' evening in the New Year.
So I'm basically happy with college, DS2 is happy with college, just got to wait for the evil LA to get involved. Before EHCPs, statements of SEN didn't apply to colleges so it's all new for them. Funding for support was worked out differently.