Great RDA on the cost effective side. O-rings are a bit tight but, just lube them with a little juice and you're good to go. Flavor is great and cloud production is pretty good. I vape for flavor honestly so, clouds are good to me as long as I get a good throat hit. The 25mm definitely has smoke room to make some pretty sick builds and the Velocity style deck benefits this RDA greatly. Even the previous could that came with it that most coil spiders shy away from were even decent for beginners at .3 ohm. Extra o-rings are a plus, the screwdriver is great and the delrin 13mm chuff cap are all great quality and add to the experience. Not everyone with like the square key screws for the posts but, as long as you don't really crank on the screws and make sure you're using the right part of the tool, everything is golden. I do not work for Wotofo but, I love this RDA.