Having the choice to remove the camera does add to the versatility.
As well as having the chance to see the pictures in the field, compared to swaping memory sticks and not knowing what's on it, until you get home.
However now there's card readers that you can connect to your trail camera while in the field, but I'll have to wait until the price shrinks a bit--they're now selling for about $150. I may go with the TrailGhost now. I haven't heard from Greg in a while and I'm always concerned when making a decision, relative to the customer service.
I noticed on the TrailGhost web page they're now mentioning the release of a 6.0 MP also.