Is the Serta Perfect Sleeper good for back pain?

It is a medium mattress, which generally suits back sleepers who want support with some give. Sleepers with specific back issues should try it in a store first, since firmness preference varies.

What size sheets fit a 150 x 200 cm queen?

That is a standard queen footprint, so regular queen sheets fit. Because the mattress is 13.5 inches thick, choose deep-pocket sheets rated for at least 14 inches.

Is $799 a good price for this mattress?

It is the best new price among the three stores listing it as of November 7, 2026. Mattress prices swing with holiday sales, so compare against the other two stores before buying.

Does it need a box spring?

A medium mattress this thick works on a slatted frame, platform bed or box spring. Check the foundation's warranty terms, since some brands require a specific base.

Is it too soft for side sleepers?

Medium is a middle ground; some side sleepers find it supportive, others want more cushioning at the shoulder and hip. Pair it with a soft topper if you need extra pressure relief.