Amazon Unbox is an online video service, allowing you to download videos to your laptop. As a frequent traveller I've started using this service recently and am extremely pleased with the quality of the video, the ease of use and availability of titles. I like to watch series (currently Shark season 2) and this is a great way for me to keep up with what I like to watch, even if I'm on the road. Episodes seem to appear on Unbox within a week, often one day, of airing on TV.
Wikipedia says:
Amazon Unbox is an Internet video on demand service offered by Amazon.com which according to their website is available to "U.S. customers located in the 48 contiguous states, Alaska, Hawaii, and the District of Columbia". The service became available on September 7, 2006 and offers television shows and films for rental and purchase from eight major television and film studios.[1] Rental pricing for feature length films range from $0.99 to $3.99, while television shows can be purchased for $1.99. Additional discounts are given for full season purchases. Downloaded films includes two versions of videos requested, a full resolution video file and a lower resolution copy for portable devices.
Maybe 70-291 is comparatively easier than 70-296, still, merely studying for 156-215 or 350-001 is not just enough to go for the latter certifications. Just in the way preparation material for 642-552 differs from that of 642-176 and cannot be used to go for a 350-030, same is the scenario in the previous case.