Note: this is for the base game without DLC/Dragonfall.
I've never played a turn-based strategy combat RPG or whatever kind of game this is, before, so I didn't know what to expect. The gameplay mechanics felt so-so when I started. I played for like 30 minutes , gave up, then picked it up again a month or two later. Strategy isn't my forte so I was hesitant to crank the difficulty up for a challenge, it already felt frustrating to miss shots and then have to wait for things to happen during enemy turns. I got used to it after a couple hours, as I learned the game more and generally got smarter about what to do. I upgraded my opinion of the game play to "yeah that seems alright then."
The class/karma point system is pretty interesting and I had fun toying with that. The decking/hacking bits were cool and I wish there were a lot more of those scenes/levels. Be wary if you go for a rigger build, there are a couple points in the game where glitches are possible to encounter, you'll have to unequip your drones to progress and it felt kinda sad considering that's the whole point of the build I wanted. The story is also very linear, I think there's only one optional mission you can do that diverges from the main plot.
It's a 2d isometric game, so if you're not into that sort of retro style you may not like it. I thought it was gorgeous, and along with story-telling and the slang it was really easy to feel immersed and taken away by the plot. There's no voice acting, only text with pre-written options (of varying personalities) of your character's reply. After a couple hours of playing I didn't want to stop because I wanted to see what would happen next. The story and atmosphere are A+ for me and I plan on buying the new game solely based on that.
There's a decently sized mod community as well. I haven't played any yet but I have a few user made campaigns to try out soon that seem worthwhile.