What do you like? The 2pc Cartomizer or the 3pc filter/atomizer?

Hey everyone just thought I would post a topic looking for general feedback from people on which type of E-CIG everyone prefers. Personally the 2pc design in our opinion is the best type of E-CIG on the market today but that's in my opinion.

For all newbies reading this topic a 2pc E-CIG design is an E-CIG that has a battery and a cartomizer. The cartomizer is a filter with a built in atomizer that gets thrown away every time you change out your E-CIG filter. (pack of smokes) When your vapor runs low and your pack of smokes is empty you simply twist off the cartomizer and twist on a new cartomizer, that's it very simple E-CIG design. The new cartomizer contains the filter and a brand new built in fresh atomizer every time yielding in a E-CIG with a very high smoke volume with every puff.

A 3pc design is an E-CIG that contains a battery, a filter and an atomizer. The filter gets tossed out every time you empty your (pack of smokes) but the atomizer is used many times. The atomizer is a separate piece of the E-CIG. When the atomizer goes bad you have to purchase a new one so your cigarette smokes well again. Once you replace your atomizer and filter your cigarette will smoke well.

With the above basics being said which design do you currently use?
Which design do you prefer?