I agee the free 5 high strength carts I got with my 901 black mini off ebay are crap, there's hardly any vapour at all... The 2 original high strength ones were much better, still tasted like those inhilators (I'm assuming these regular highs that come with the black mini are unflavoured?) but there was much more vapour. My neck muscles actually feel strained today from my first day's use yesterday, and I went through 3 carts!! I didn't run them completely dry but it's not the same when your getting wisps of vapour.. I only smoke around 8 roll ups a day normally!! I'm really hoping the 36mg marlboro e-juice I've ordered does the trick or this is going to cost me a fortune!