Pro: Great video and sound(!) quality!
Con: This site (like many others) opens adult and malicious popups when you play the videos.
If you use an adblocker, it says it reduces your download speed.
Just close the popups which are telling you you won something, or how to earn 5000$ a week, and you should be fine.
I don't know if you can get a virus from the popups, though.
Its a very good site for videos, but full of ads and spam.