I have been a big gan of The Guild since i first touched the guild 1 years and years ago. I have all of them on cd still but decided to buy the steam version when it was on sale just to have a back up.
Its somewhat of a niche game though. I highly doubt the vast majority of people would enjoy it. Its very slow and time consuming, especially if you go multiplayer. The game is incredibly buggy also. Most of the bugs are not game breaking but they can get very annoying. I reccomend heavily modding the game. Its fairly easy to do and mostly involves changing numerical values in text and if your able to understand basic html you shouldnt have a problem really working with the files to get what you need done. (i know the coding isnt in html but it isnt much more difficult than that to edit).
Personally i love the game. Die Gilde i spent tons and tons of hours on. 2 I have quite a bit of time into as well just killing time at work and home. I personally like to make the game as difficult as possible for myself. I start with almost no money and a house and give the npcs a bunch of advantages. But for lighter game play id reccomend giving yourself a big advantage which is easily done by editing the config file and changing a few numbers.
All in all id give it a 7.5/10 due mostly to bugs and difficulty setting up multiplayer matches (which require you to have all files exactly the same in a game that needs major editing to work at least somewhat properly). But i want to note this game is not going to be up everyones alley for certain and while i think people should at least try it i know many will be dissapointed.