Here's my take on the Zeus RTA.... Not bad, but.... The bottom does get stuck to the inner piece of metal when you try and take it apart. When this happens, there is no way to get the metal piece off without using pliers which causes the metal to bend. When the metal bends it will not fit properly back into the glass tank and will crack the glass. At this point there is no way to re-bend the metal back to normal and the whole kit is junk. Good concept, but not very user friendly when it comes to changing coils or cotton. It's too bad because the kit looks great and works well.