I've had one unit (charging case) in the last 6 weeks and 4 or 5 different pods. The charge case gets recharged every night and the battery still lasts the whole day so that's a positive right there. I'm quite a heavy vaper but one pod lasts me 13-14 days. It's definitely more cost effective than others I've purchased. I've bought so many replacement pods just to experience the different flavours available. They're all really great tasting and the coils seem to last until the juice is almost gone. 5 stars from me
