I enjoyed this game to the point that I regretted not backing it on Kickstarter. It's a charming adventure, and beautifully crafted. It isn't long (I finished in around 8 hours, if I recall correctly), but the length well suits the game, and feels right. The characters are great; but the puzzles, as some have mentioned, are fairly easy. The only one I got stuck on was the snake puzzle. I don't really find this a problem, as I really just wanted to experience the story, humor, and world. If you don't care about a challenge, and are just looking for an entertaining adventure, pick it up!
I backed the Kickstarter at a tier that got me a physical collector's edition. The physical goods were disappointing, but not the game. I think you will find this game rewarding, providing you are interested in the story, and want to build your character such that you solve everything with dialogue and avoid combat. This game does NOT have anything to do with Planescape: Torment. I knew that when I backed it, and I am not disappointed. Planescape: Torment is the better game; deeper in every way, and with a more satisfying ending. I feel Torment: Tides of Numenera takes longer to pull you into the story and world, but it is still worth it, and I hope there will be more games like this! I played a Strong-willed Nano who Brandishes a Silver Tongue, and focused on everything that gives me dialogue options. I ended the game in less than 35hrs with a Gold Dominant Tide (Blue was my second, and Indigo my distant third tide) and Legacy of Guardian. I also completed my companions' (Aligern, Matkina, and Rhin) side quests, Rhin's being the most satisfying. I think the creators of this game primarily focused on making it rewarding for my specific play style. However, the dialogue is a bit transparent, and doesn't have as big as impact on the world as expected. Basically, there are only 3 things that contribute to your ending. Your tide, your relationship to other characters, and your decision at the end game. Unfortunately, if you prefer combat, or playing more disreputable characters, it probably won't be as enjoyable. If playing a pacifist do-gooder appeals to you, I think you will enjoy it. ...and I would be excited to back a second game!