I myself am an advocate for the Leatherman.I own a Leatherman Charge now,and before that a Wave and can say that both are the Cadillac of Multi-tools.If rusting is a major concern,the Charge is made of high grade stainless with titanium handle,so no worries there.As far as size and weight is concerned,they are not a problem either.Add to that a leather sheath that allows the user to carry the tool in either the open or closed posn,positive locks for all implements,the fact that you don't have to open the tool to access the blades and a 25 yr guarantee,and you've got yourself a lean mean fixin' machine.
Leatherman also addressed the problem of the sharp edged handles by contouring them and the "palm pinch" problem by redesigning the inside edges.The only multi-tool that I ever pinched myself on(and cut my thumb wide open,I might add)was the POS issued Gerber tool.
I've owned the Scharade tough tool and again have nothing but good to say.With the Scrahade tool though,I found weight and overall size an issue,and when I bought mine,the lack of needlenose pliers(which they rectified).Overall a good tool.
Bad points about leatherman?Really the only one is cost.They are such nice tools,that you won't want to take them to the field for fear of losing them.
my 2 cents
PS-check E-bay,you can get all the fancy multi-tools at rock bottom prices if money is a option