Yes and no... while the light and battery together seem to be a nice system, they are in fact propriatary, so that any replacements or repairs will also be as costly.

I have a NR digital pro-12 system and paid around $300 for it new, I am now faced with having to replace the $159 battery, when there are clearly power sources available for much much less, that deliver the same capacity. But because of the mount and connection, I am somewhat screwed. (although in reality I will probably forgo the cool "waterbottle" mount and just put a bunch of NiMH in a bag, at 1/4 the price).

So while really great lighting is a good thing, getting locked into a specific "limited release" system sucks.