Hi everyone! Just picked up our X-Maxx 8s this past Friday and had a great weekend with it! Had to go with the 3S Lipo 5000mah due to not having the 4S 6700mah in stock (ordered directly from Traxxas this past week and should have it by Wednesday). Honestly, the 3S was more powerful then I could have imagined! Can't wait to see what the 4S does! This is a great truck and my son loves ripping around on our Slash as well! The snow banks here in NY create perfect jumps and sidewalls to climb!