If you are actually looking for a firm, stiff mattress then this one is for you.  However, if you're like me and want something that offers support AND plush comfort then stay away from this hybrid.  This is my first time ordering a mattress online and I decided to go with this hybrid because I thought a total memory foam would provide too much cushion.  Here are the pros and cons about my experience:

PROS
1.  The price & quality-  For $300 you would think the mattress wouldn't be of good quality, but that's not the case at all.  This mattress is great quality.
2.  Set up-  It arrived on time and set up was simple.  It reached 12" fairly quickly and it doesn't have any smell that everyone seems to complain about

CONS
1.  HARD AS A ROCK-  it feels like I'm sleeping on hard couch cusions or the floor.  I'm disappointed, but I guess that's what happens when you order online and cannot try it in store.