We are still shopping for a mattress set. Sleep Mart had the model we wanted to see, i.e., the Serta iSeries "Vantage", the new version of the "Applause" model that was ranked #1 by Consumer Reports. However, buying there was going to be inconvenient since they did not have the ultra-firm and they did not have a King size, and it would take 4 to 6 weeks to get one. The salesman was cordial and had a lot of "sales pitch" but little actual information. He couldn't tell us how many coils in a King size, the working twist of the coils, etc. In light of the inconvenience, we were unwilling to pay their $60 charge to deliver