Our mattress arrived very quickly!  The 'unboxing' was a fun experience.  We have a king size so it was definitely a 2 person job.  Once it was unwrapped and on our bed, we opened the vacuum seal and it was ready to go in seconds!  I didn't experience any breaking in time.  Great nights sleep from night one!  Not too bad for only shopping online (thanks to covid!)  Great experience all around.