the main problem with TT indoors is hermies...hieght is a lil bit of a battle but no more than any other sativa. it can be grown indoors with sucsees if you have good light intensity and a good environment...yields wont be as fat as outdoors, but they hold thier own. its just not "recomended" lol
example; Indoor clones may herm on you, but the mother plants is fine...the same cuts flowered outside will show no signs of hermies. Its just one of those weed mysteries, that is the reason why its usually listed as a outdoor strain.
What Frmboi said, i think he means your buds will not fill out like the OD ones, and you wont pull off human leg sized colas like the outdoor plants give you, indoors it becomes a avg/good yielder.
Not to get you off your plans...but if you wanna grow this maybe you should have a look at some of the crosses avail.....like TT x Skunk , TT x NL5...i have the TT x Skunk and thier bomb, big plants to, no hermies. My buddy is running the TT x NL and he says hes ripping off bat sized colas and the smoke is good. Heres a link
http://peakseedsbc.com/seeds.htm
You can also look at Purple Pineberry if you wanna another fast plant simaler in structure, but more indica , im not sure who carries good PP anymore, but its good stuff to. TT is about 70% sativa, but grows like an indica
IMHO TT is one of thebest outdoor grows but one of the least recomended strains, but i think its due to not bieng known so much outside the islands.
Im not sure if your aware but real TT is only avail in clone form, any beans being sold are hybrids and back crosses, they are good mind you but they are not really 100% TT, the only place i know you can find it legit is on Vancouver Island and some of the other islands. Hope this helps