That's one of the guns I have. It's great and you'll love it. Just watch for the optical trigger. I had some trouble with mine and couldn't figure it out because it would only fire under certain conditions. Turns out sunlight was getting into my grip frame. Anyway, just keep that in mind and you'll be fine. Cleaning it is easy, and don't mess with any of the front pneumatics, ever, unless you know exactly what you're doing. Really the only thing you have to do is remove and lube the bolt, clean out the barrel, and a drop of oil in the ASA. Standard stuff and with the autococker, removing the bolt is very easy. Also, the vengeance manual on the site is still good, and the xonik frame manual can be found here:
(guess you already found it, my bad)
Here's some info that explains how to tweak an E-Blade, which is very similar to the xonik frame. Just don't do any of this until you're sure about what you're doing. Always ask for help if you're unsure and don't do anything if you can't get help.