I've never bought a guide and I'm not about to start now. By the time I've finished my first playthrough the wiki should be fine, anyway...
For a full-blown RPG of this scale, having a guide can actually be handy for a lot of things.
I guess you can use the Wiki as an alternative but it's not usually as comprehensive until quite some time after the game is out and everyone has played through it.
There are videos popping up for the Cullen, Dorian and Cassandra romances, but nothing on Sera yet. It's both a curse and a blessing because I am rabidly curious about her but then it prevents spoilers.
I wonder if we can get into a proper argument with her... with throwing stuff around and everything. Followed by a 'make-up make-out'. That'd be nice!
What I'd like to know is whether the romance scenes in this game happen towards the end or earlier. It sounds like they can happen anywhere in the middle but I'm trying to avoid spoilers so it's hard to look into it further.