This game should appeal to new comers to the magic universe and those who have not played in awhile. However, will leave any active magic players wanting more.
First if you've played magic in the past this is a great way to get in and learn some of the new rules that have been added recently (combat damage has chagned a lot!). Of course they don't actually tell you that these rules are so you are forced to read up on it on the internet.
Second if you've never played magic this is a great place to learn the basics of gameplay, concept of each of the five colors, and some useful deck concepts and card synergies.
One of my main complaints about this game is the lack of customization allowed when it comes to decks. Basically you unlock a core set of ~7 decks which each have 12 cards you can add to them. Of course you can only ADD cards to decks you can't create a deck from scratch or remove cards that start in a deck. In addition this game has quite a few bugs. Some which can prevent rounds from progressing, some which cause drops on live network games.