tokamak + can be heated using the plasma current (although you have to add additional heating to reach the required temperature and control the plasma) + simp

tokamak + can be heated using the plasma current (although you have to add additional heating to reach the required temperature and control the plasma) + simpler construction + older and therefore people have more experience with it - pulsed operation - collapse of plasma current (disruption) can cause massive mechanical stress (hundreds of tons) stellerator: + continuous operation + no risk of disruptions - complicated construction - external heating of plasma - has to be larger than a tokamak to retain the same volume of plasma