My rebuildable experience is a couple months with a true IGO-L. I wanted to try adjustable airflow and double-coil and thru the post coil mounting.
Received the product in excellent time, well packaged, and intact.
The drip tip is OK, its not machined like the RDA, and appears slightly less quality, but it does fit well. It's more or less free so...who cares?
The rest of the RDA is almost top-knotch. The airflow ring moves smoothly, has sharp checkering for good grip, but is hard enough to move that it shouldn't get out of adjustment once you put it where you want it.
The posts, and particularly the little phillips head screws and their threading is excellent. The phillips heads on the screws is very sharp and good, unlike those on my IGO-L.
Overall, if this was the genuine article for which I had paid $120, I would have been about 95% satisfied. This clone, at this price is an outstanding value. For the money I'm WELL over 100% happy with it! It looks and feels like it should last virtually forever.
I did a double-coil build with 30g Kanthal, cotton ball wicks, 1.5ohm, and it vapes excellent. Reasonably easy to build.