I have a bunch of twists and clearo's. I have thought many times of upgrading, but having these twists makes me enjoy the vaping world and have extra money for trying new flavors. I use Gandalf and Huntsman from HHV, and Casablanca and Applewood from BWB, plus a few superb VapingZone signature tobacco blends which are quite good. But every now and then I try new flavors from different vendors. I can do this because I feel comfortable with my system. I feel that if I upgraded it would have to be en masse because I have several vapes going at once, and they'd all have to have the same system to taste like I want.
Then I'd have to get the cool tanks and...... you know what happens next.
This is not to say that I will never upgrade. Right now I'm having a blast with my twists.
Anyway that's my opinion....for now