Nice cooler.  I have had the 30 Bottle cooler for a few years, and have been happy with that as well.  Overall, this is a good solid unit and manufacturer.

Temperatures....yes, the setting is going to be lower than actual.  In my 30 bottle 55 gets me 57-58 degrees, bottom to top.  In this unit, 52 gets me and average of 57 on the 10th shelf and about and 59 on the third down.  For me, this range work just fine as it would the average person collecting the amount of wine this unit holds.  Past this, you really need to think professional installed cellar.

Bottle count.  This will always be off no matter the manufacturer.  Creative usage is always a plus.  Wide bottles such as Landmark Vineyards Pinot's will drastically reduce your count.  I use my 30b bottle for these type along with desert wined and some whites.   I have one shelf of Pinot in this cooler  and with that, should get about 65-70 bottle in this.