it is if you have a TALL room. I have only grown it inside because I live in alaska and it would be frozen. You flower it when it is only like 8 inches tall though. You will need 4-5 feet of space. I would recomend topping it for sure. My untopped plant was right up against the light (in a cool tube so OK) at 6 feet in height. my FIM topped plants grew to be 4 or so feet tall. so they abviously are reall growers.
to make it short, it is possible. You just will need a good sized light, 400 watt at least, and some space. It is a real great strain. for sure in my top 5 sll time for smokes