I had one for a couple months. It was a good truck for the most part, however I had some gripes that kept me from really liking it.
- Springs were way too soft
- Engine was hard to start and had decent acceleration, but not what i'd call fast
- Clutch is a bad design and really needs to be replaced with an aftermarket unit of some kind
- Darn near impossible to get to the LSN to adjust it
If i had fixed those items, i would have liked the truck much more. Its was very nicely built. Most of my gripes with it were minor except that i didnt really like the engine that well. I like my jato much better mainly because of the engine, but it also seems a little more durable (at least with the RPM arms/bumper it seems to be).
Overall, the firestorm is a good truck, and the engine may suit you perfectly. Id say it could use some small tweaks, but it is fun to drive and handles well.