"... Two-thirds of this book deals with 'Open Sicilian' positions, in which White plays 2 Nf3 followed by 3 d4. This is by far the most common way for White to meet the Sicilian. White opens more lines for his pieces and attempts to exploit the fact that he will be ahead in development.
Let's take a look at the possible opening moves 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 ... . White is up in development and can move his pieces more freely. Black, however, has a structural advantage of an extra central pawn, which gives him long-term chances of taking control of the centre. A typical imbalance has arisen. The onus is on White to exploit his lead in development in order to secure an early initiative. If White plays passively or his initiative runs out of steam, then typically it's Black, with the better pawn structure, who enjoys the long-term chances. Thus it's quite rare for a state of 'dull equality' to arise. Often in the Sicilian, if Black 'equalizes', he is already slightly better! This structural advantage is seen in most Open Sicilian lines: for example, the Dragon, the Najdorf, the Scheveningen and the Classical Variations. The major exception to this rule is the Sveshnikov Variation, in which Black accepts pawn weaknesses in return for activity. ..." - GM John Emms (2009) in Starting Out: The Sicilian, 2nd Edition
Around 2010, IM John Watson wrote, "... For players with very limited experience, ... the Sicilian Defence ... normally leaves you with little room to manoeuvre and is best left until your positional skills develop. ... I'm still not excited about my students playing the Sicilian Defence at [the stage where they have a moderate level of experience and some opening competence], because it almost always means playing with less space and development, and in some cases with exotic and not particularly instructive pawn-structures. ... if you're taking the Sicilian up at [say, 1700 Elo and above], you should put in a lot of serious study time, as well as commit to playing it for a few years. ..."
What makes this opening stand out, if i play black for instancse, in what way does it favor me?