I use the program a lot myself, I personally find it one of the best tactical pattern trainers. Yes some of the tactics are simple , but if you cant quickly see them ,how can you advance to more complex tactics? You can go over the same group of problems until you master them.
Chessimo

I like the Chessimo app, although I've only completed the first 26 units. I spend more time with other training apps. See http://chessskill.blogspot.com/2013/02/chess-tactics-training-on-ipad.html
I am a 44 year man that has dabbled with playing chess numerous times. Unfortunately, I am still at a very low level as I have never invested sufficient study time (or maybe I am just too dense). I am thinking about consistently dedicating myself over an extended period of time, but am not sure where to start. I have found the app chessimo. It is obviously a huge program that will require a great deal of time to finish. However, I wonder if my time will be best spent using it. Right now, the problems are relatively easy, and I do not understand how it will improve my "chess vision." If anybody has used chessimo or something similar I would love to hear your thoughts on the long term benefits.
Thanks.
Chris Phillips