Not really, it will wear out due to radiation so you need to change the body periodically, unless you use other fuel like helium-3, but it's got it's own proble

Not really, it will wear out due to radiation so you need to change the body periodically, unless you use other fuel like helium-3, but it's got it's own problems - much higher fusion temperature and very rare on our planet (a lot of it on the surface of the moon though, it would be worth mining if we had working reactors).