I've been vaping for 5 months now and loving it. I've gotten all my juices from Rob at Vapor Kings. He was out of what I usually order (30ml 24mg 555) so I ordered from another supplier recommended here at ECF. It came yesterday just in time, as I had been stretching out my remaining drops. I used the new juice right away. Tasted just like the 555 I'm use to, great. My problem is that it seems to be giving me a bad headache. Any ideas why? Thanks all of you, this is really a helpful place.