I'm liking it so far. It seems to perserve the setting and the spirit of the original Syndicate games while shifting the genre to FPS. The gameplay displayed so far seems promising and I'm hoping it'll be Deus Ex-ish in the end.
Just for the record, I dislike the XCOM FPS because not only are they shifting the genre to FPS but they are changing the setting and pretty much cutting all ties to the original games. Syndicate at least preserves the setting so the genre shift isn't a big deal for me.
Granted, I'm looking more favourably on the XCOM FPS as well now that they are also making the XCOM strategy game too and tying the two games together...