I have the Fire and Ice bar on my truck, looks and works great.
The kids at my local Best Buy I know well, so I paid them to install it for me. Took about half an hour. I didn't have it screwed on (yet, will if it slips) it was installed Jan last year and is still sticking strongly.
I chose to have it appear when breaking rather then keep it running while main lights are on. My truck is a darker colour and the blast of sudden red light keeps people from tailgating really well. When shifting into reverse out of a parking space people jump to get out of the way too, no questioning you're backing up.
I bought mine from realtruck.com.
You buy it from them, but it's shipped from the company that makes it... mine arrived snapped in half. Realtruck.com
has awesome customer service, however the makers of the bar's customer service could care less about shipping damage - they even tried to blame me even though I was only asking for replacment... It was a huge hassle having it replaced so buyer beware there. If it wasn't for realtruck.com backing me I would have been screwed.
Anyway, the only downside is you hardly ever get to see it. I was just tonight admiring mine in a storefront window just to make sure all was working well, and it is. I love it!