The only creatine I have ever used has been monohydrate. Why? Because it is the only one that has been tested and reported on in peer reviewed journals, and has been shown to be effective.
A number of weeks ago, Santa Dimaggio sent me a bottle of Irongmag Labs CEE to try out. I gotta say, I really liked this product. My recovery time between sets is much quicker, as is my efficiency to handle great workloads.
Even though CEE has not been labratory tested, the product from Ironmag labs gets my seal of approval.