What is the best memory foam mattress topper?

Is your mattress just too hard and/or you can feel the springs when you lie on it (like there just isn't enough padding?) or is it also worn out to where it bends too much and just isn't supportive overall? If it's not supportive, then a new mattress is the solution (box springs too, or just get a platform bed). If it's just a spring issue, then a mattress topper can help. When it comes to memory foam, thicker is usually better. I would at least go for mid-range thickness. I wouldn't think spending the $ to get the best one out there would be cost-effective, bc you're just bandaging a cruddy mattress. Eventually, you'll be replacing the mattress anyway. So go mid-price and you should get something of quality, without over doing it. You need to be aware though, that memory foam sleeps hot...meaning it's likely to make you sweat at night. I hate it, personally. But it's all about preference there. My husband and I bought a set of refurb mattresses when we first moved in together. They were supportive (at least at first) but the springs were so close to the surface that if you tried to lean up on your elbow, it would hurt your bone. It was just really hard. So we bought a box-quilted down mattress topper from Walmart. It was about $50 for a queen. It helped, but still wasn't quite there. We ended up putting an egg-crate type foam pad underneath it, then it was ok. Until the mattress finally gave out in support, it kept it soft enough we didn't get poked. I chose this option bc of the memory foam being hot. Should you decide to replace your mattress, might I suggest checking Walmart. I didn't not purchase one of these, bc I was in too much of a hurry to get my new bed, but they do sell "mattresses in a box". It sounds weird, but if you look, the reviews are really really good. They basically take a normal mattress, vacuum seal it, roll it up and box it. Then you just unroll it and once you break the vacuum, it expands right back up. Just allows them to be shipped easily. I have provided a link for you to see one example of what they have. They are pretty cheap too! I just bought a mattress from a local store though, but I did purchase my bed frame from WM. I got a platform steel frame (link below) that I LOVE! It's really cool. It allowed me to not have to purchase the box springs (saved me $) and also gives more support than any bed frame I've ever used. It does not squeek or move, and I literally put it together in less than 10 minutes. It'll also be SO much easier to move when we do move than another frame would be. I'm telling you about this bc some of the reviews I read, people said how getting this frame helped them continue to use their old mattress longer. Since it's more of a complete structure (rather than just slats like a box spring is on the inside), it gives more overall support for the mattress, making less dips when you lie down. It might be something for you to look into, whether you replace your mattress or not. It's only about $100. The queen size/king size are also the same thing (there are extra parts to make it king), so you've got a frame for a king if you ever decide to upgrade. We already upgraded to a king, and I LOVE it! One more thing...for about $20, you can purchase brackets to fit it that allow you to attach a headboard and footboard (also from WM)...so it doesn't have to look like a platform bed. Oh, and it's 14" off the floor. We bought a 15" mattress, and with the 2 combined, I have to climb into bed...it's really high. I'm 5'10". : )