I have been using these for about six months and LOVE the product. I am one of those people that doesn't drink coffee like a normal human; I have to turn a cup of coffee into basically a sugary sweet dessert. For a typical large gas-station sized coffee, I might put 8 vanilla creamers in, for example. So instead of using creamer and sugar, I have found this to be an excellent alternative.
First of all, note that this thing rates a serving as "only" 25 calories. But before you start celebrating, realize that there are 300 (yeah THREE HUNDRED) servings per bottle. That is almost equivalent to 15 Big Macs. You have been warned.
The shelf life once opened (does not have to be refrigerated) is rated at 30 days, although I have been going through these at a rate of about 1 every 2 months.
The flavor is indeed that classic vanilla creamer flavor you get in the little packets.
The bottle includes a pump, although I have stopped trying to mess with the pump system. It is MUCH easier just to remove the cap and CAREFULLY pour in a little bit into my coffee. Yes, it is easy to put too much in, but once you get the hang of pouring in a little, it works great. The problem with the pump is that it would stop working well as the liquid level dropped (basically to the point that it was not usable).
The value is good in my opinion; this is less than the cost of the powdered creamer I used to buy, and for me is just as easy to pour into the coffee (and makes less of a dusty mess).
In summary, I highly recommend this product for high volume users of creamer!