I've logged a few months on my MFLB and a week or two on my PA.
The MFLB has been treating me wonderfully when well set up, although I've found the battery-management to be a real downside for me. It requires a good brand of battery and a fresh charge - either from careful preparation (dedicating many batteries to it and charging every day), or from additional equipment such as a fast charger.
I'd say with a fast charger it is ready for heavy use, but even then, there's definitely a learning curve with friends. The MFLB's learning curve seems to be about "halfway through the second session". I never thought of "inhale slow and warm, remove and shake" as being too advanced, but it seems like each person just has to see for themselves - watch it brown a little, and then get caught off guard by a smile.
My favorite "additional" equipment though, is the power adapter. Rather than a fast charger at $60, I'd get it. The car use is incomparable, and even indoors it isn't terribly inconvenient. And ... it's super super reliable. Draw speed no longer is a learning curve issue, it's just down to taste and preference. SUPER SUPER controllable, with a spot on the knob for anyone. When first trying it, the only accident was getting too excited and overloading the trench. With a slow inhale (open your nose a little so you could breathe through it, but instead go as slow as possible through your mouth) I had milky thick smoke, and STILL only a lightly after smell. It kept going and going, with plenty more waiting for another go.
Stock was out on the car portion of the PA, however it's an inexpensive adapter ($10) since it just needs to take 12V from the car with no conversion.
PS: The button on the simulated battery for my PA is ... partly or completely non-functional. (It doesn't toggle the power, however when I don't push the button sometimes the power indicator in the MFLB draw appears weaker and no vapor is produced). Is this something that is remotely user serviceable? I know the MFLB guys will set it straight if not.
EDIT: Button cover was on too tight. A tiny unscrewing as directed and now the gentlest hold on the button keeps it on and it flips totally off when I let go of the button.