After being content with the first Vype e-Stick, it was then taken off the market as being 'non-EU compliant'. I then tried the Pebble, and bought quite a few refills; but all of them left a very bad taste on my lips & tongue & I stopped using it - I still have many refills unused. I now have the e-Pen and will see how I get on with this. I have spent a lot of money with Vype!