i got my first 2 in yesterday and opened one up to try and bam the th was so strong i was like damn. these things do get so hot that you do need a drip tip. so i made a tip for it out of a round cartridge that i had from my first kit. so my rating will be on performance 10 out of 10 and now for the bad. first you will need a high drain battery for these or run some in parallel and they do get really hot so a drip tip is a must i made mine. over all i give this carto a solid 8 out of 10. only reason for the 8 is the heat and battery. batteries need to be high drain but other than them 2 things it is a solid product. i would like to thank you all for getting me started in vaping and will use you for all my vaping needs. ps first week off analog and loving it because of madvapes 
