Sledge is awesome. Not worth the full MSRP awesome, but you’ll have a blast for $400. Chassis is weak around the motor mount, an upgraded center diff mount/motor mount is probably the only upgrade it really needs and solves the problem when the chassis inevitably bends there. Some people break the hinge pins on the rear, but I haven’t managed to bend one yet. I did strip a rear diff on 6s, but I also beat the snot out of it… so I don’t know if I’d consider it a weak point or if it’s from landing on throttle accidentally.
I’ve lawn darted it at the skate park, driven into tress at full throttle, etc. I have never driven an RC with as little care as I have the sledge. It is probably one of the most durable RC’s I’ve ever owned and Traxxas nailed the plastic compound. The aluminum could be stronger, but soft aluminum isn’t just a Sledge issue. The Kraton has a similar problem with chassis bending with a lot of abuse.