Decided to move my post to here. Seems a better place for it.
I downloaded the 64 bit .iso and installed it on my HP laptop. I have to say that my initial impression is that it is very stable. The installation went without incident, and I have finished installing all my usual apps such as Dropbox, Google Chrome, Google Earth, etc. All of them are working perfectly.
I've tested streaming video performance on YouTube and other sites and it works smoothly, including in full-screen mode.
This is the first time I've used a 64 bit version in a while, and I have to say that I'm pretty impressed.