Ten days with the Vapefly Nicolas mtl and all good so far. No leaks, easy top fill, simple coil change, good threads. Simple good Vaper, just what us ex smokers are looking for. I have 2 now, one I use for home with a low cost vape and one for the Pub with a high PG no cloud vape. Ive found clouds of vape trouble some non smokers, they view it all as smoke and I dont always have the chance to explain that its only harmless vapour.