Having a thicker (high profile mattress) like this can be a great option if you:
Are a side sleeper: the higher the profile, the thicker the surface layer meaning your hips and shoulders have more padding around them.
Share a bed with a partner: The thicker the mattress, the less motion disturbance you'll feel if your partner gets out of bed or tosses and turns at all.
Have a larger body frame: a thicker mattress can resist sagging and handle more weight as well as provide a higher bed to get into and out of.
Lower profile, more lightweight mattresses like this are convenient for:
Frequent moves/moving mattress between rooms, as they are more transportable.
Better accessibility for individuals who need an easy bed to get into and out of.
Less costly as a mattress and, if you have low-cost sheets, they will more easily fit a lower profile mattress.