Anyone got one of these and have an opinion.  Never really thought about getting one, but I was in Academy and it was cheap ... and staring at me ... and I am a sucker for more tools.

Yes. It's a neat little tool. I've used mine a few times, but I run NiB, so usually just a wipe down is needed. That tool does make life easier (though not essential). One thing I wish they would change is to make both ends separate, so both could fold into the handle (would be way more compact and easier to store).
For the $ though, totally worth it.
Actually, if you scroll down a few pages, you'll see my (sort of) review of it.

I have one and its phenomenal.  My BCG is WMD Nibx, but it still gets a ton of carbon build up on the rear of the bolt, and this gets it off quickly.  UBuyNao.