Product review (5 stars): I live in AZ and these units work great.  No complaints & I have three (3) units.
I have bought three (3) of these from Amazon.  All arrived on time (with Prime in 2 days!) and in perfect condition.  One was bought last year (April 2015) and the other two a month ago (April 2016).

Temperature comments:
First off, I live in AZ and keep my house thermostat in the summer at 80 degrees.  So I am making these units keep up in an environment not suited for wine storage.  But these have worked like champs! As others have said, the temp that is set is not necessarily the temp that it reaches internally.  I bought separate kitchen thermometers for each so I can always make sure the units are keeping the wine temp where I want.  I set mine for 55 degrees and the actual temp in the middle of the rack is always around 60 degrees...consistently.  Note that it is a couple of degrees cooler at the bottom and a tad higher at the top (proving high school science teacher's theory correct).  So just put your good stuff to be aged down low.

Bottles it fits:
I have had little problem fitting most of my various bottle sizes in the wire racks.  As for girth, yes those fat Pinot Noir bottles will fit but a bit snug.  You can't put them all in one row, so you need to mix in some smaller bottles in between.  As for length, other than a longer than normal Muscato bottle, I have had not problem storing the longer white wine bottles like Rieslings.  Door shuts without issue.  More space lengthwise than I expected.  Very happy with what I can fit in this chillers.

Noise:
Its a fridge...it has a pump to make sure it is cold...it will make some noise.  Again, I live in AZ so these units are always fighting my environment.  They make a low hum that I rarely notice.  It is not bad at all.  I don't keep it next to my bed, so what is the big deal.  I have had not rattling, shaking, etc.  Just a nice, easy low hum that tells me they are working.  The thermometers noted above prove it to me.

Overall, extremely happy with these units.  Would definitely buy again...especially if I wind up with more wine club memberships.