My previous mattress was very firm, so I was a little hesitant about ordering the Casper Hybrid, but I definitely wanted a softer yet supportive mattress. The Hybrid is the right combination of both 
and I am very glad I purchased it. It was very simple to order, unbox, and assemble. I agree with the recommendation of trialing the mattress. It did take me a couple of weeks to adjust to it, but now I wouldn't go back and am happy with my purchase.