Either I have been unlucky or the Vype Pebble was not tested properly before being sent to market. The problem isn't with the pebble battery part - that is fine, it charges quickly and lasts somewhat close to the manufacturers statement. The problem is with the cartridges. I order 2 boxes and 1 cam with the device, giving me 5 in total. Every one of these cartridges on more than one occasion leaked "e-liquid" into my mouth at some point during use. Furthermore, each cartridge lasted for very different timeframes. The cartridge that came with the device lasted 3.5 days, where as the other 4 purchased barely lasted a day - 2 lasted less than a day. As someone who isn't a heavy user, the difference is vast. I have had the device 1 week so far, after the 1st cartridge finished I was expecting to be able to purchase approximately 5 boxes to last 1 month. However all cartridges are now empty in 1 week, I would need to purchase 10 boxes at this rate - this actually makes it cheaper to get a megabus to Germany and purchase rolling tobacco for the month!!!!!! Due to the variations in cartridge life, I decided to open them up to see if there was an internal problem. All of the rubber seals weren't good enough to seal in the e-liquid. The liquid had leaked out of the seal and into the mouth piece part, which is why liquid was ending up in my mouth on multiple occasions. The liquid had also leaked onto the circuit board which connects the coil to the cartridge. this wasn't a small amount either. It was covered in liquid. This occurred in all 5 cartridges. the chambers are either being over filled to meet an expected lifetime criteria or there is something fundamentally wrong in the manufacturing / design process of these seals. For a product containing a poisonous substance, this could be quite dangerous. very poor