Personally, bijo, I couldn't vape V4L's cartos. I got incredibly nauseous, got headaches, and felt like I was going to pass out. Actually, my experience with V4L was so bad that I decided that
vaping wasn't for me, and I gave up. I thought that all e-juice must taste that way, and just determined that I must be one of those people that couldn't do it.
Thankfully, I decided to try it again. This time, I got a model that uses USA juice in their cartomizers. Haven't had ONE issue with getting ill.
I know that many people vape V4L and have no problems (case-in-point, most of the responses to your questions right here in this thread), but I personally am sensitive to chemicals and they must use something in their juice (I think it's Chinese juice) that affects me in a negative way. You're probably the same as me. I would switch to another brand of cartomizers, or just buy blanks and fill your own with USA juice from a good supplier.