As they say we spent one third of our life sleeping, so when come to buying mattress I will never compromise since a good night sleep is the answer to a good day job. That is why I choose Miracoil spring system .
Pros: High coil counts that support right to the edge of the bed and it also gives a firmer support which will not give any mattress sag despite of using it for the last 3 years.The best thing is it has a "head to toe coil" which claims that any changes in weight distribution will be transferred right down the length of the bed to minimise partner disturbance so as to have undisturbed sleep the whole night . For me since my husband is not that heavy, I am yet to see whether this is true. It comes with 10 years warranty.
Cons : It is very heavy because of so many coils inside so lifting the mattress to change bedsheet is a little more difficult