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