Hello, I am using the DVD (VNX Unified Storage Implementation - MR-1VP-VNXUNIIMP) I have received from colleague to prepare for E20-390. But the DVD is 3-4 years old (on CD, its written 08/11). Can you suggest if it make sense to go through this DVD or I need to buy new VILT DVD? Do you think there are many changes on new DVDs/ course? Or it's just same product, no changes? Please advice.

Cheers!!