Absolutely awesome tank. I have the 30mm, and it has a huuuge velocity deck, massive airflow, juice control, easy wicking and a lungsmashing 10mL of tank volume. When building for high power, with 50% PG or more, it has a tendency to leak just after filling, easily overcome with a couple of dry pulls with closed airflow right after filling. I think with a full tank there is so much juice that there is extra pressure forcing a deep into the chamber. Aside from the little leak at first I have had no surprise leaks with any builds. Approx 1mm overhang on rx mods at the front, but sits flush with the front/side corners nicely. I'm currently using it on a Hugo Boxer V2 and it has about half a mm overhang at the front. Machining is perfect, and it comes with a spare glass (tinted and clear) and delrin and steel chuff caps. The tank is so large that it stays fairly cool and the steel chuff cap hasn't got too hot for me.
If the size isn't an issue for you, this tank is excellent and very flexible.