Memory foam mattress????

just a general question....would you buy a memory foam mattress for your babies crib???its kind of cheap only $134 but i was wondering would this be a good investment for a baby or should i just get a regular mattress im just asking for opinions/advice thanks.
Update: i stay in Atlanta and the regular mattress is different prices the cheapest i seen was 74 and they go up from there its from Target though
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