Power strategy or Tal World Champion?

Did anybody try these two chessbase dvd titles?

I'm asking here, because I'm tired of reading fake reviews paid by publishers, which give 5 stars to every title!

http://shop.chessbase.com/en/products/marin_power_strategy_1_opening_to_the_middlegame

In chess, like in the real life, one frequently faces temptations: to grab a pawn, to occupy an open file, to start a kingside attack and so on. There is nothing fundamentally wrong with all these ideas, but before undertaking such concrete actions, one should be sure the position is ripe for it. Chess is so complicated that making the right choice on the basis of calculation alone is not always possible. This is when general rules and principles come into play to to help us distinguish between what we would like to do – and what we should do. In other words, it is a matter of establishing the right order of priorities. This series of DVDs aims to demonstrate the importance of taking proven principles into account before choosing the direction of your over-the-board calculations. The first DVD deals with the initial phase of the game, when the all the reigning principles can be crystalized into just one: DEVELOPMENT! Deviating from the natural course of development for the sake of some illusory advantages is likely to lead one to the same fate as that of those sailors who fell under the syrens’ spell – ruin. The DVD deals with a wide range of situations in which development and developing moves are the highest priority. After having watched the lessons on the right way to navigate from the opening to the middlegame, viewers are invited to test their skills with a host of quiz videos. You can further sharpen your skills with the included database, which contains games covering themes that correspond to the ideas presented on the DVD.

Or this:

http://shop.chessbase.com/en/products/master_class_vol2_mihail_tal

No World Champion has enchanted the chess world as much as Mihail Tal did. His reign as World Champion was short but in his time Tal’s star burned with unknown intensity. With his combinations and his intuitive sacrifices the young Tal ran over his opponents, and thrilled the chess world with his risky uncompromising attacking play, which inspired many players to emulate him. In 1960 he beat the reigning World Champion Botvinnik but one year later he lost the title of World Champion again in a return match of doubtful competitive value. But even though Tal was no longer World Champion, he still remained one of the best players in the world. At eight chess Olympiads he won gold with the Soviet team. Six times he became USSR-Champion. In 1973/74 he managed to remain unbeaten in 93 consecutive games, a still unmatched record. In 1988 he won the Blitz World Championship. Despite his frail health Tal enjoyed life to the fullest and was a funny and brilliant man, who loved nothing more than chess. Through the games of Mihail Tal this DVD provides a unique access to the realm of chess tactics. Tal’s colleagues dubbed their tactical guru „Magician“, because in his games seemingly incomprehensible moves in the end blended into a successful whole, as if by magic. But Tal was also a master of strategy and endgame play. On this DVD Dorian Rogozenco, Mihail Marin, Oliver Reeh and Karsten Müller present the 8. World Chess Champion in video lessons: his openings, his understanding of chess strategy, his artful endgame play, and finally his immortal combinations. In an interactive test they invite you to try to find combinations like Tal did. The DVD also contains all games by Tal, many of them annotated, plus comments and tournament tables.