This is my favourite Marvel game and one of my favourite card games. The game is a lot of fun and really captures the spirit of the marvel comics.
Marvel Champions serves as a very good entry point into LCG (Living Card Game) style games. This base box contains everything you need to play Marvel Champions and has enough content and variability to keep you engaged for a long time, so you need not buy anything else if you wish to go no further. However the game is constantly being expanded with new Hero and Villain/Scenario packs if you wish to delve deeper or just pick up your favourite Marvel characters to play with.
If you've played any kind of deck building/customisation style game before then this will be very easy to pick up. If not, don't worry, there are pre-built decks for each Hero and a handy quick start guide to get you playing in no time.
The game plays great at any player count from 1 to 4. It's a wonderful solo game, and also a great game to play with friends, especially if they're Marvel fans.
I find the game very aesthetically pleasing too. The artwork is lifted almost entirely from the comics as far as I can tell, and the graphic design and symbology has a very classic four colour comic feel to it which all serves to immerse you in the world of Marvel.
This game gets a resounding thumbs up from me.