Just done the same a few weeks back. We went across on the same call package as under Plusnet and I've seen the first direct debit come through from EE and it is the same as it was under Plusnet.
There is just one oddity which is a small DD charge (around £1.50) I've seen from Plusnet AFTER the DD changed to EE that I just need to check into but I think it might be a monthly retention fee for my Plusnet email mailbox which I have only used for testing occasionally in the past and don't really need.
This does raise an interesting question over the actual cost of service delivery for BT and whether it might have decreased. i.e. if I had changed my Plusnet service to SOGEA (broadband without a landline) and taken my landline to a VoIP provider, it ought to have come in a bit cheaper than moving to EE - but I suppose you pay a bit of a premium for having an integrated solution from one provider.
