I was a little concerned with these mixed reviews because I bought a Kenneth Cole belt like this a few years ago and have been very happy with it.  The quality was decent then and still is today.

The brown color on my prior belt was a little darker so I was happy for the change where I could mix it up with lighter browns.  The convenience of having a double-sided belt far outweighs the downsides for me so that is why I got this newer belt and ditched the older one.

SIZING
I have a 34" waist and bought a 36" belt so add at least 2".  I use either the 5th or 6th holes out of 7 (with 7 giving you the most slack on the end and 1 giving you absolutely nothing left over).  The length measures 41.5" not including the buckle.

UPSIDES
-- The belt is double-sided!  No more carrying a second one when you are traveling or in a rush.
-- The belt looks pretty good.  Other double-sided ones either aren't shiny (not useful with dress clothes) or the buckles are a ridiculous promotion for the brand (you'd have no idea who makes this one).
-- The price is decent.  I would rather spend $23 and have a lot of versatility with a product than $160 on two belts ($80 each if you go to nice stores) and forget one.
-- If you are scrambling in the morning and put on the wrong color, you can simply twist the buckle and turn it around.  Maybe not a very common occurrence but it's happened to me a few times in the dark.

DOWNSIDES
-- My prior belt (exactly the same as this one except the brown side was darker) eventually had one side split off a little.  You could always glue it back together.
-- The belt will get a bit creased over time if you are constantly using the same holes.
-- The little screws in the buckle come loose with age.  It's easy enough to tighten them with your fingers or a screwdriver you might use on your glasses.

OVERALL
Grab one!  Can't beat a price just over $20 with free Prime shipping.  It's not the nicest belt on the market but it is really practical.