It all depends on the level you are if your are a college student looking for summer training in networking then yes network bulls summer training program is the place for you to enhance your skills and increase your knowledge  

However if you are already working with a multi national company and also hold a CCNP/CCIE certification, then its useless for you.

Always keep in mind knowledge is always useful and it makes you great. 

All the best cheers thanks !!