Absolutely Impeccable!
After a few weeks of using the Sai Top Air Flow Atomizer coupled with the Voopoo Drag 2 Refresh Edition, I am absolutely blown away. The design of the entire mechanism is ingenious and very easy to use. The titanium bucket included is also designed very well, paired along side the 4mm kanthal with quartz, as well as the 4mm stainless steel with black ceramic. Every single one of these coils produces great hits and great tastes. Furthermore, the glass mouthpiece attachment for the TAF Sai works like a charm, don't go without purchasing this item.
While temperature and wattage preferences may vary, the settings provided by HVT and helpful review videos on YouTube can provide you with great information concerning temperature control and wattage control. Within a day of fiddling with the numerical values and settings, I was able to dial in perfect settings for each of the coils. All it takes is a good, slow drag technique when coaxing vapor from the mouthpiece.
All in all, these items are worth investing in and you shouldn't be disappointed. I am very impressed with the Top Air Flow Atomizer, and very pleased with the Voopoo Drag 2 Refresh Edition, glass mouthpiece attachment for the TAF Sai, and coils listed. Thanks HVT!