Alienware 15 newbie

I'm new here. I currently own an Alienware Area 51 that I picked up off Craigslist for $150 a couple of years ago. I know a dinosaur but man that case looked so cool and did the job for about a year.

Anyway I had to buy a new laptop for work but I wanted something that I could by games with that was reasonably priced so I bought an Alienware 15. I hope I made a decent choice. Anyone have any experience or have any tips with this model?