I got this when it came out, but I finished two other games instead (Wolfenstein II and WW2). However, my wife finished Origins and she's completing the map now.
She likes it a lot more than Syndicate and Black Flag. I have watched her play a lot of it and I saw her finish it. I for one really enjoy seeing Egypt and Senu is a great asset to have. It helps a lot more than Eagle Vision did IMO. I really like how gear can be upgraded and how you can basically hunt.
The wildlife are fun creatures to see interacting with everything and exploring is rewarding. I say all this because I read a few people question returning their copy or not.
I enjoyed the plot and sure there are times when it's just filler stuff, but it's not terrible filler stuff. My wife loves roaming around and the weekly online stuff are cool.
I like everything I've seen. I will start my playthrough once she's finished. There were times when I would watch her go somewhere like a tomb and it would look like a ton of fun. There's also times where you find something really interesting and it's literally one or two rooms. It feels like they didn't try with a couple areas. There's one in particular that was a huge let down.
The world is put together really well if you ask me. I loved The Witcher series. I gave up on AC for a while. I played all of Desmond's story, but then I just bought the games because they were AC. I bought IV, Unity, Syndicate, and a few others.
I actually got into watching my wife play through Origins. The story won't win any awards, but it's interesting if you understand the AC lore.
They haven't made me interested in the plot outside the simulation since Desmond's series. To me, Origins Egyptian world is a lot of fun. It's a lot of eye candy. Syndicate was a dark game and the flow to everything is a lot better in Origins.
I hate how I watched the majority of the game, but it was neat. I will probably play the game differently (my wife is a completionist) versus myself where I want progression with a good plot. I'll skip that boring quest for something more interesting.