UPDATE Nov. 2019:
There is a new, updated version of this foundation and it is called "Double Wear Stay-in-Place Matte Powder Foundation SPF 10". You can read my review under the new name.
I have been for years a faithful user of this powder foundation, mostly because the shade Pebble matched my slightly tanned complexion like anything else in the world. The case lasted me almost 8 years with an average of daily usage for 3 months a year, as it was generous 16g. The only gripe I had was that it was not so long-lasting on my combination skin, but used on top of Perfectionist serum and/or a primer (BareMinerals) it lasted quite well.
I have decided to finally buy a new one, also because the new case has an extra space for a sponge or a small brush, which is very useful for touch ups on the go. I remembered having read that since it has been reformulated 2014 the colours are not longer the same, so I asked to the SA if the new Pebble was exactly like the old one. She said yes, and I also compared the new one to the old one there at the counter and so far they looked pretty much the same.
When I applied the powder the next day though I noticed a few differences: the new colour doesn't correspond to the old one. The new Pebble is much lighter and neutral, almost ashier then the old one. I can wear it right now because I'm only slighlty tanned but as soon as I get darker I will need a new shade and I really don't know which one would match my skin. I welcome EL improving the texture of foundations but I really don't understand why they always mess with the shades, keeping the same names and codes.
Also the texture has changed. The old one was creamier, more moist, so the brush would pick up more and I would achieve a good coverage much faster. In comparison the new is dryer, more like a powder and you need to layer more to achieve the same coverage. The overall effect is indeed very natural and smoothing, I also think that it lasts longer than the older version.
What I didn't like is that after two weeks of usage using a brush it has built a bit of a stain on the surface that I had to remove with a tissue and the golden ring around the pan is easely scratched, which never happened with the previous model. And finally I have noticed that the amount of product has diminished, there are now only 12g.
I'm not sure if I will buy it again, it depends how long I can wear this shade, as for now it seem to be more of a transition shade, and I'm scared of having to start experimenting again to find the right shade for me and considering that it is not cheap I guess that I will start looking for more affordable but equally good brands.