What doubts are you having? Then we might be able to address those in our replies.
I have the PB you're considering. First one crashed regularly - tho was may have been partly due to the drivers for the ADSL USB modem I had then.
Replacement one has no problems (6 weeks old) tho I have switched to an ethernet modem through Airport. No kernel panics, no dead pixels.
The screen is lovely - lots of space for doing everyday tasks on. I don't do video editing, but building my website in Dreamweaver X and using Photoshop Elements has been fine in terms of both speed and screen space. The problem with white spots has been resolved. Some people have an issue with unevenly illuminated screens but some don't - no real answer to that one
The HD is a little slow but hey, it's a portable. If you're coming from a computer that's a few years old tho it's going to seem a lot faster regardless!It can get quite warm, but so do most portables, especially if iTunes is on - I've no blisters tho!
I have SimCity 4 loaded onto it which again is fine although once the city got up to 90,000 residents it started to run a little slowly at certain zoom levels and the graphic rendering misses out some buildings but it's a pretty high spec game.
My favourite thing about the PB compared to friends' PC laptops is how quickly it wakes up. My friends tend to shut down their laptops since waking from 'sleep' can be fraught with trouble, or it takes at least 20 seconds to be available and another 20 seconds or so to be connected to the network. By the time I've lifted the lid of the PB fully, it's awake. By the time I type in the URL I want, the Airport connection is back up and I'm off.
Result - I have the answer before their machine's awake. And yes, I know it's less than a minute but it's those little things that I appreciate most