There can be a few drawbacks to buying a hybrid mattress.
If you prefer a firm traditional mattress, you might not like the softer feel of memory foam. In addition, most memory foam holds heat. So if you get hot when you sleep, be sure to get a hybrid mattress with built-in cooling technology.
Hybrid mattresses are also much heavier than the average mattress, which can make them difficult to transport. Finally, mattress with lower quality materials can sag after a few years.