I have the Scoutguard and it's good.I got 2 of the new 2010 8MP Bushnell Trophy cams and believe they are a little better.
The Scoutguards are not weatherproof.The manufacturer tells you that.The Bushnell has a sealed,gasket housing.
The Scoutguard has the seperate control that you plug in to program or change settings.Forget to take that along and you can't change settings.With the Bushnell,it is all done in the camera-no seperate piece to carry.
Both cameras have great battery life and and trigger speed.Very important.
The Bushnell can be set to 3MP,5MP or 8MP.Scoutguard is 5MP.
The new 2010 Bushnell takes can use the newer high capacity cards,16GB,though I doubt I will ever need it.Those would hold something like 1300-1500 or more pictures.The 2GB cards work in both cameras and should hold a few hundred-plenty for me.
They make steel lock boxes for both cameras and I really like them for bear country.
I bought 2 Bushnells and 2 lock boxes for $400-free shipping.The lock boxes normally cost $32-$35,so $165-$168 per camera.
I bought a lock box for the Scoutguard also.I like it but my next ones which I hope to get soon will be the Bushnells.Just a little simpler and a little more there for the same money.
The Bushnell is 3.5"x5.5"x2".