That is my favorite feature as well, but if I had never tried it, it wouldn't be something I'd miss. The point of my post was price, especially if the person comparing a v2.5 to a P3 doesn't build their own coils. I wanted to stress that using a v2.5 isn't "settling" for a lesser device. In the past some new vapers have sometimes been given the impression that they can't have an acceptable vape without a ProVari (or other high end device) and I'm hoping the infamous suggestion will not become, "Just get a P3."
At it's highest setting, Boost 5, the boost is 1.25 seconds. While an advanced user might tell the difference or someone vaping a P3 back-to-back with another device that has the same resistance coil and juice, for someone on a tight budget my opinion is the feature doesn't justify the cost unless the person is already disappointed with heat-up time. None of my other devices have a boost feature and I don't find their vape disappointing. I don't know about you, but my draws are longer than 1.25 seconds, so by the time I've inhaled the coil has heated up.
I'm not knocking the Boost feature or the P3, I'm vaping it right now, but I haven't had such an amazing experience that I feel, for example, my Reos are noticeably inferior. For someone advancing from an eGo, I think a v2.5 would blow them away as much as a P3.
Overall, this comes down to a belief I have posted many times. Potential vapers are often skeptical that vaping will get them off of cigarettes. Most of them have tried to quit by other methods and been unsuccessful. Each time an attempt to quit fails, it makes the next attempt even harder. People often try vaping as a last resort and already feel defeated on some level. Quitting smoking is very stressful and it only adds to the stress when new vapers are given the idea that if they don't spend more than their budget or learn immediately how to build coils they will be wasting their time and money.