Not bad just not as safe as a whole nerf bar made of aluminum. Check out Pro Armor. They have Great products. Thats what I purchased for my 400ex. I have ProArmor Fat Pegs. Its got the heelguards and better pegs. I love them. I am not sure what is made for the XX though.
I recommend sticking some nerfs on that thing before you really go out and get after it.......I'd hate to get sucked under one of those rear tires and roosted out the backside, OUCH!! There are a lot of great brands out there, I chose AC and really like them. The best performance upgrade I've made is some Maxxis Rarzs on the rear, they make a huge difference over the stock crap. Exhaust, programmer and filter are for sure great upgrades I have only added a filter, one of these days I'll get to the other two upgrades. Great quad, hope you enjoy!