I've never used one, but if it's the model without the new ZX7 processor I wouldn't get it. For the price of the Core you can get a new Wildview TK30 or TK40 with the ZX7 processor which has better trigger speed and battery life. Just my .02.
I got one as a gift and have it out on public land right now. Ill let you know when I pull the card. Sent from iPhone
A local place was running a sale on them for $80 apiece, and that included batteries and a cheap sd card. I have a feeling that they aren't very good, judging from some other reviews that I've read online.