I have a 6000 btu unit and it works great. 

The good:
Infra red heat is cozy
It's vented and keeps things dry on the inside
There's a thermostat
It lasts quite a e on the aux battery and propane (1-2 weeks of keeping the van at 55-65 in sub-freezing temps)
It's fairy quiet

The bad
It takes up space
You don't want thing too close

On Mar 14, 2011, at 8:16 AM, Al Knoll <anasasi@GMAIL.COM> wrote:

> Got one?  How well does it work?
> 
> Pensionerd (Homeless again)