I had NBT retro fitted to an E92 a few years ago. I found it worth it at the time and was a massive improvement over CCC. In saying that, if I was doing it again I would consider some of the newer Android boxes from China, something along the lines of this:

https://www.aliexpress.com/item/4000...archweb201603_

NBT is very dated at this stage so wouldn't be worth the effort or cost, you'd be looking at EVO to make it worthwhile.