Hi wssviper,
Mattress return policies are built into the cost of a mattress under the assumption that a certain percentage of customers will return or exchange it so the customers that don’t return or exchange a mattress pay for the ones that do. The actual return rate and the cost to a retailer or manufacturer that is added to their mattresses would depend on the specifics of the policy, the type of mattress and the options it provides for “fine tuning” after a purchase, their success rate with matching mattresses to their customers, and on what they do and how much they recover their costs with returned mattresses. Each person is unique so there is never a guarantee that an online purchase will be a good “match” for the needs and preferences of any specific customer so this would really be a matter of your “risk tolerance”, whether you are more on the “I can sleep on anything” end of the scale or the “princess and the pea” end of the scale and your confidence in the suitability of the mattress for your specific needs and preferences based on your conversations with them and your ability to test mattresses locally that would be similar (usually with the guidance of the online retailer or manufacturer).
In other words … it would be would be part of your personal value equation and isn’t a reflection of the quality of your mattress or a “warning sign” but would be a caution to take into account as part of the “value” of any online purchase.
Phoenix