same taste as p.t.1 cause its the same heads ect- so no difference there- the draw is slightly stiffer for sure, and the fact you can take it apart for easy cleanig is a huge plus!!! i have noticed that the metal bracket that the air-flow stem screws into seems to cause an air bubble - but so far no preasure/vapor lock.. i had to get one to try, and walking around work with a rba is a bit much!!! im sure these will be a hit just like the p.t.1, even more so due to the fact you can pull them apart!!! vape on!!!