I love the vapir one it gets me fucking ripped! While it does work its still not that great of a vape. The metal coil heating element leaves a bad taste in my mouth, while its not horrible it is noticeable. The plastic case gets extremely hot while vaping, and god knows how many chemicals are seeping out. Air leaks out around the tray that holds the bowl. Also I do believe the temps are inaccurate, I highly doubt it puts out 400F.