We have one of each of their models.  They are pretty good but in my opinion the plush is too soft and the regular is too firm so there is no place in between.  We ended up adding a latex topper to the standard to get right what we wanted.  There is a thin layer of poly foam on top of the latex under the cover though.  They are well built though and pretty economical.  The regular one had a 32 ILD and the plush model has a 19 ILD, 2" top on it.