EDIT3: Looks like crashing and hdmi issues have been fixed with a new patch today. I will leave the edit in but will move it to the bottom.\
I put 100 hours into the xbox version before waiting for pc to come out. The game is real good. I am biased though since I put over 700 hours collectively into the first.
The game is very similar combat wise, however the flow and focus is slightly different about this game. The game starts you off with the ability to go 3 directions and any of the paths will lead you to something you need to get to. Eventually the game get's more linear toward the end, almost the opposite of Dark Souls 1, which started somewhat linear and branched out at the end. Other changes include the upgrade system, which has been streamlined, however I find it way more intuitive than the old system. Any normal weapon can be upgraded to +10, as long as you have the titanite. Midgame, you find an ember which lets you imbue a weapon at any upgrade level to different paths including magic, fire, lightning, dark, poison, bleed, etc.
Another big change is how bonfires and enemy respawns work. You can now fast travel from any bonfire, and in the main hub you can level up from a woman similar to the first game, Demon's Souls. Also, enemies now stop respawning after ~15 kills, and can be restored using a bonfire ascetic which kicks the area's difficulty up to NG+. More positive things include the way duel wielding works, as well as bows being more viable.
The first 2 Soul's games each had their own problems, and for each problem fixed in this, a new problem was introduced. In this, the world is more like Demon's Souls in that it is not connected, it is linear paths branching out. However unlike Demon's Souls, it hardly loops around and provides shortcuts. Instead bonfire placement is very common which is somewhat lazy level design. Some of the environment details are missing as well. The scenery can look very ugly in some places.
Boss design and boss music is also slightly lazy. Most are good bosses but a lot are just guy's in armor with greatswords. There are less interesting fights than Demon's Souls and less memorable fights Than Dark Souls. This also goes for enemy design. The music is also very samey for most fights.
Overall, I think it is on par with the other 2 games, and which you like more will depend on if you like better gameplay or better world building.
-The new upgrade systems is very nice.
-More Dark Souls!
-Some very good looking areas
-Harder than the first game
-Way more content
-More fleshed out/less useless covenants
-New healing system is a combination of the other 2 games, which some may not like (I don't)
-Fast travel from the start
-Soul memory (helps stop twinks but also makes it harder to connect to people)
-Lazier enemy, world, boss, npc, and environment design
-Lack of the original lighting system
-Some areas look very ugly
The game is a pretty solid mix between the other games, and it is definitely on par with them. Whichever you like more will just depend on what you value more, atmosphere and world, or gameplay
After putting some time into the pc version, gotta say it's real good. It's a solid port, and infinitely better than the first one. It supports any resolution, and at least 60 hz (I don't have any higher), and there are a decent number of graphical options. The game's mouse/keyboard controls are better, and are rebindable. However, the game is still better with controller, and the xbox prompts are still there instead of keyboard buttons.
Also to those saying the game is easier, you may be better than when you played the original. Also I found it "harder" even though I died less because they throw a bunch more enemies at once, and backstabs, parrying has been nerfed which makes dealing with crowds harder.
EDIT2: Looks like people are having issues with crashing and other things. I will warn people about this, however I have had no crashing other than when I downsampled which was my own fault. I'm sure this will be fixed but you may want to hold off for a bit. That said, my review still stands.