Routed my Nextbase 402G today. Got it off eBay for £60 as 'refurbished, very good'. Box didn't have a dent on it, all packaging was in place, everything was still cable tied together, looked like an un-used gift or something. Very happy with it, bargain IMO at under half price for practically brand new.
I've been using it with
http://www.registratorviewer.com/index_en.html which is perfect.
My only comment so far is that during the day it'll sometimes not get the exposure quite right, so it can make daytime scenes quite dark. Probably something I just need to fiddle with in the settings. You can adjust the exposure with a button on the thing, but don't really want to be doing that while driving