Hi, we had our TA do our ADR's last year, we gave her a list of what we wanted and then when she could get us those ressies we planned our days from there. There were a couple of ressies we couldn't get and ended up calling and changing ourselves later on, if you can't get something you absolutely want than continue to call daily to see if you can get them incase someone has cancelled. We are planning on going in Sept again and I will have my TA book for me again, and then hopefully I won't need to change them.
Good luck with your ADR's!