Product review (5 stars): Great product, great customer service.
I've had this product for a couple of weeks.  I have it full with 21 of the standard 750 mL bottles and there is no issue with fit.  The unit is quiet- I can hear it when it is cycling but is a very low level of noise (I'm hearing a fan in the back and it is like low level white noise, ie doesn't change therefore not really noticeable).  I have the upper zone set to 58 degrees and the lower zone at 55 degrees.  After a week, I checked the temperature of the bottles using an Extech IR thermometer and found the bottles in the top to be 60 degrees and the bottom bottles to be 58 degrees.  I checked three different times of the day and found similar results.  I set the temp therefore about 3 degrees cooler to compensate.  After I did this I decided to check the accuracy of the IR thermometer and found that it has a deviation of +/- 3.5 degrees (from the literature) so it is very possible that the thermometer was off that much instead of the unit, or some combination.  I'll place another thermometer in the unit to check this again, but the point here is that it is very consistent.  Since there is no seal at the front to separate the upper an lower zones I am surprised to see an actual temperature difference, but that may be in part to the lower temperature being set on the lower zone, which is where I would expect colder air to naturally go.

On a customer service note: I did not attach the door handle right away and thus either I lost the attachment screws or they were not in the package.  I wrote to customer service and explained this and simply asked for the screw length and thread size and advised them I would just pick this up locally.  The responded by sending me a replacement set of screws even though I did not ask for them to do this.  This is what customer service should be like.

Overall, I love the unit.  It looks nice; and does what it is supposed to do.  Would I buy another? Nope- it's too small and now I have more wine I wanted to store than I thought (but that's my problem and has nothing to do with the unit)  So I would get one larger.  Would I recommend this unit?  Yes, I don't believe that I could have been more satisfied with anything else at this price.