Wow, not at all disappointing. Quite amazing power for such a lil' guy. I did not even attempt 14.4v, There was really no need. The series connector is still in the bag, waiting on dual 4 cell packs. I ran a traxxas 1200nimh, a duratrax 1600 single, and 2 1600's in parallel.
I ran on pavement first with the traxxas pack that came with it. It was a rolling machine TBH, but I dialed in the steering response a bit and practiced a bit. Took it on a dirt road and let it loose. It's so small that any large pieces make it roll, so I had to "make a path". Absolutely amazed at the power and speed. Got air on a perfect curb twice so was quite pleased that it did not have a tendency to backflip. Less control in the air than a rusty or revo, but less deviation to begin with.
Then we went to the dirtbike trails with the slash and a 12 turn rusty. This is where it really impressed me. There were no jumps that I could *really* hit without modifying the track. I.E. there were roots and whatnot that a dirtbike could easily traverse, but stopped the slash dead. However, there was mud, puddles, and smaller trails. It was able to climb one of the trails that wasn't even wide enough for a rusty, the slash climbed it did it with Tamiya like realism, but.. you know... fast.
It is one of the best values I have ever got "out of the box", tied for first with the Revo to be exact. TBH I was expecting the Traxxas battery to be meh, it was the surprise of the day. It had plenty of punch and runtime. Not even close to a 1200 sub C pack in a 1/10 (in a good way obviously). The articulation is great also.
It was a bit heavy with 2 packs in parallel, that's the only other physical downside I saw. Aesthetically her but sits kinda low, but the truck looks pretty cool running. Once I get the shocks dialed I think it will fix that a bit also.