You cannot go wrong with the ones made by Ehpro. I use my five every day for the past year and have no problems. I was a carto tank fan and love how I can tighten the draw on it to mimic a carto tank.
Now you do have to be careful about tank cracking juices. But the original has the same kinda of tank. I use a glass carto tank and a Protank for those kind of juices. But nothing beats Raspberry Tea in a Kayfun!
And no supplies to buy hardly ever. I bought a bag of Japanese cotton pads and a 100 feet of Kanthal...I am set for the next couple of years easy....all for 14 bucks!