Excellent. This is a very comfortable mattress. 
I bought my Octasmart Essentials Hybrid Mattress just over one year ago.
I selected the less-firm of the two options (having read that some people found these harder than they expected). I am mainly a side-sleeper, and weigh about 13 & half stone (86kg)
I've now been sleeping on this for over 12 months. It is still as comfortable as when it was new, with no signs of a 'dip' or sag. 
My order arrived very promptly. I was fortunate to get an exceptional price deal, and of course realise that cost may well influence your choice.
For comfort, practicality and useability, I cannot fault this matress.