DGBL
Digital Game Based Learning
Pros and Cons
A few pros:
- the teacher can customize a learning environment to meet specific needs of the students. 
- the learning environment can be designed to underline a very specific part of a lesson eg. Neurotransmitters.
- an existing world can be adapted to fit the teachers’ own didactic design - regarding content, method and time spent.
- the build tools are intuitive and its easy to create content quickly, if you have an idea for a design.

Cons:
- designing content is time consuming, but what takes most time is actually designing the learning experience, not the placing of blocks. Once a world is built it can be shared, reused and developed.
- a challenge can be for the teacher to maintain a focus on the element of play. Some didactic designs simply utilize the game environment to create a learning experience without any actual gameplay. 

These are just a few of the good's, the bad's, and the ugly's that I have found and I must say that both are very good and show the various ways the program can be used and taught.
The website below is the site where I found this list of pro's and con's.  
http://gamebased.tumblr.com/post/29333883407/pros-and-cons-of-teachers-creating-content-in