This will be my next monster truck after I finish some other projects. Linc has one converted and the diffs are so good he sticks them in everything now.
Got an XL recently, it's a helluva truck. Unfortunately I found out I'm allergic to Nitro, so I'm selling it. But yeah, they're solid machines. If you get a new RTR, make sure to loctite every screw that goes into metal, though. They do fall out!