the Rode ntg8 has a magnificent construction. it is durable and sturdy. It comes with a tropicalized metal case.
The sound quality is typical Rode, it's fine for normal, female voices but you may encounter some problems in case of particularly deep male voices, very very deep eh!
Obviously being a long shotgun, you can not expect to use it indoors, but in exceptional cases, with environments without reverb yes. It happened to me in some occasions and the result was good.
Would I buy it again? I don't know: it's for those rare occasions when you're really far away or to focus on certain voices compared to the rest.
I'd say it's specialized, if I had to choose a more generic product I'd turn to Rode's brother ntg3 or the new ntg5 (but I don't know it personally) or other brands.