Good feedback. I've heard/read the NC-30 is a monster but isn't exactly a "sipper" on the wood consumption end. On your other points, I'd also be considering it for a basement install to utilize an existing, centralized chimney to supplement the insert upstairs. Dirty glass doesn't bother me so much as heavy ash-ing and short-lined burn tubes.I probably have to be careful not to make the 30 sound like a bad stove. It's not. At its price point, under $600 for some, it's a deal that can't be beat. It heats my house cheaply and I want to be fair to it.
That said, I'm not thrilled with mine. 2 complaints are specific to the stove itself, and the other is to the style of baffle that is really quite common.
I'm not happy with the air wash system. I always have ash all over my glass. It's not a big deal with my application in the basement, but if it was in my living room I might feel differently. Some have blamed this on the doghouse air hitting the splits and sending debris back against the glass. They removed the doghouse and plugged the air holes that feed it.
The next one is also not a huge issue. I don't like the ash drawer. It's too small to be of any use. I've removed 6 gallons of ash at one time. The drawer might hold a gallon. I made a new plug out of a spare firebrick. It just a drawer that you can't store anything in now.
The last one is the ceramic baffle on the top. They aren't very durable and are pricey to replace. They do work though and that is why they are so popular. As it comes from the factory the baffle does not stop all of the smoke from exiting up and around it. Some have placed rods beside it. I shoved kaowool along the edges to help the stove. I just don't think the system is durable. Other stoves have steel or even firebrick baffles. Both are more durable. As you read the forum, you will see a good number of threads about broken baffles.
Just my opinion though. The stove does it's job.
Appreciate your 2 cents.