pros and cons
petrol :
needs lots of open air
will ruin your grass or patio
noisy
absolute bitch to tune engine
dirty
suffer with cooling engine
get hot enough to burn
can run for hours
go fast
attract lots of attention
battery/electric
clean
can be used indoors
quiet
limited to about 15-20 mins run times
batteries take hours to recharge
all in all great fun :D