I was trying out version 15 in the beta channel, and noticed that is was slow and I was having troubles with videos. When I switched back to version 14 I noticed it was faster and didn't have as mush problems. I hope in the up coming months that version 15 will become faster and not have so much problems. So for right now I am going to stay in the stable channel for chrome os. Because it seems to be the best channel on chrome os and it is more stable than both the Beta and Developer channels. Plus I can always turn on the flags that are for like the new tab page and other things. So for right now I am sticking with the stable channel for Google's chrome os operating system.