8 hours with the game so far on PC (i7-4790k / GTX 1070):
4 hours of MP:
+ If you enjoyed ME3's MP, you'll enjoy it here
+ Maps are smaller, but more vertical - allowing dynamic firefights more often and matches go by quicker
- Rubber banding, lag and weird animation issues
- Sound mixing is awful and needs to be fixed
4 hours of SP:
+ It looks and plays nice on my PC at 1440p / 60 FPS with a mix of high and ultra settings
+ Gameplay gives you more variety with access to all skills
- Planet scanning is simplified, but kind of pointless and takes up time (especially if there are no anomalies to scan for)
- Some of the dialog and writing is just bad
- Just like with the MP, animations are weird and all over the place
It's Mass Effect, so the sense of wonder and planetary exploration keeps you wanting to play more. Will be another divisive game in the series, but I don't think it's terrible - there's fun to be had in MP and SP! It gets a purchase from me since I'm engrossed with the series and I want to see the story through 'til the end to see if BioWare made any improvements.