Is the Purple grid worth it if I already know I hate the sink of memory foam? Mattress

Politely disagreeing with the person above on one point. "Does not feel like foam" is true, but most of the current line has foam layers under the grid, so how foam-like it feels depends entirely on which model you buy. The thinner grid over thick foam felt far more familiar to me than I expected, and if you are running away from a sinking sensation you want the deeper grid, which costs meaningfully more.

Temperature is the underrated part. The grid has air channels running through it, so it does not hold heat the way a foam surface does, and for me that was a bigger day-to-day difference than the feel. If your current complaint includes waking up sweaty, weight that heavily.

Three years on one. The grid genuinely does not feel like foam — it collapses under a point load and stays flat everywhere else, so your shoulder sinks and your ribs do not, which is the thing you are actually asking about. What nobody warns you about is the weight. It is awkward to move, awkward to rotate, and if you ever need to get it up a narrow stairwell you will need two people who like you.

Side and stomach sleeper here too, similar weight, and I lasted eleven weeks. For me the grid was too willing to let my hips through while my stomach position wanted a flatter surface, and I ended up with lower back ache I had not had before. Return was painless, refund arrived within a couple of weeks, and I say that specifically because you should not be scared of trying it — just do not assume the trial is a formality.

Motion transfer, since you named it as your constraint: this is the thing the grid is genuinely excellent at. My partner gets up at 5am and I no longer know about it. If that is your primary requirement, the grid designs and decent all-foam are both fine and innerspring is the only category you actually need to avoid.

Terse: buy it from somewhere with a real trial, sleep on it three weeks, and stop reading threads in the meantime. Every mattress feels wrong for the first ten nights when you are coming off a broken-in bed, including the right one.