I will begin my review by urging you to buy this game if you in any way enjoy the previous games in the series.
Gold and Silver were indisputably the best games of past generations, and now they've been pimped up with modern graphics and a few minor tweaks to provide the best Pokemon games so far. If you've played previous titles, it's more of the same, really - but does that matter when it's done well? The games have always been formulaic, because the formula works, and works very well.
Added into the game are a pair of new areas, which as I'm only 4 1/2 hours into the game at the time I write this, I've yet to explore. The thing I look forwards to most, however, is being able to explore two regions again, as well as old favourites such as the ship between regions and such forth.
No recent game has put such a massive smile on my face. No game within the last two years, in fact. If you opt not to buy this, it really is your loss.