First Impression Excellent
We have only owned the mattress for a couple of days so will check back after 30 as well. We got the King size with the two Twin XL 9" foundations. We currently have the mattress/foundation right on the ground. The first night we slept directly on the mattress (no topper) and I found it a little too firm (woke up with some stiff muscles) but this was the very first night so could be the mattress is just too new. With our mattress we purchased a 1.5" cool foam topper and we slept on that last night...uh..mazing! The best night of sleep that I have ever had in my life. We got the very firm mattress because we don't like to sink in and we like how firm the edges of the mattress are for sitting on the edge. The mattress topper adds just the right amount of cushion on top of the very solid mattress underneath. We had also looked at the Blue 1000 Cushion Firm model which has some comfort layers...but was just too mushy. This combo of the Blue 300 Firm and a gel foam topper...perfection! Motion isolation was also an issue that we wanted to address and this mattress delivers (thought I think a less firm mattress would be even better). Because the mattress is very firm if my husband flips over violently I do feel it a little..but not nearly as much as our previous foam (online mattress starting with letter C). I'll check back in in about 30 days once we have broken the mattress in a bit for our full impressions.