I bought the 18 thru 00 set. Let me start with the positives: well made, nice pouch, and there is also a 0.5 Gauge (9mm) taper included that's apparently not available separately. I used this first to successfully gauge up a scrotum piercing from 6g to appx 4g.
The negatives, or at least something that should be spelled out better, is that these gauge sizes are truly metric and the exact mm sizes as they are listed. In the size and gauge help section the chart lists gauges as per the AWG standards, and I have some jewelry in those gauges. For instance, 4g in the taper is 5mm, in AWG it's 5.189mm. Trust me, it's enough not to fit the concave indent. Also, when it comes to the jewelry, the EXACT size should be listed, the gauges aren't standardized. Overall though, the tapers are well made.