From my personal experience edureka is good site but because it is online university it doesn't enforce you to have necessary skill before you jump into the Big Data e.g Java.
Because of this you will face some very unnecessary basic question from your peers. But overall it's good online training institute with affordable price.

Since you are looking for placement, they will not help you for placement though. For that it's better you take local on site training instead of edureka.

Also can I know why do you want to get into Big data world? Not to scare you but Big data world is quite Big. I mean it's yugggggggggggggggggge like Bernie Yuggggggeee. hehe
You got to know lot of different tools like Java, some linux background, some datawarhousing background etc.

The reason why I don't like this open source project is that they change so much and they are marketed with very big hype. You have to use 10 different tools to just to get basic thing done and those tools change so much. Tough Spark/Scala try to solve those problems but in my opinion it's not there yet.