This is a great entry-level crawler. Plenty of power ( snapped and axle in less than 10 mins lol. I got it bound up. Not the trucks fault.) Comes with three sets of springs soft, medium,  and hard. The battery it comes with last around 15- 20 mins. I bought a 5000mah battery and I have crawled for well 9ver 45 mins with little to no pause.  Only 2 things I recommend doing. 1st is to trim back the wheel arches quit abit, the tires get hung at full articulation. 2nd is to change the 4mm red banana plugs out for tamiya.  Opens up a whole new world of battery options with tamiya plugs.