1. The first thing is, forget the old myth about getting the hardest mattress you can find.
2. There should be extra support along the edges. "People sit on the edge of their bed to put their shoes on. If the edges break down, then the center will break down over time
3. Pillow-top mattresses, which add a layer of cushioning to a moderately firm mattress
4. Investing in the largest bed you can afford, especially if your (or your spouse's) condition involves a lot of moving or twitching. "This minimizes the effect on the bed partner".
5. Lying down in the showroom and seeing what feels right. If can, get one with a good return policy in case it's not suitable for you after a couple of weeks.
P.S. If you find the hotel's mattress very comfortable, do ask the front desk on the mattress brand and model :)
