VC,
Are you messin with me?
We do a pretty good job with our patios, but there are definitely others who do just as good work if not better. In saying "better" I mean mainly some others ability to build more complex project involving stairs and multiple levels.
Check these guys out (way out of my league, my hero):
http://www.marpaland.com
When we're not using demo saws and diamond blades, we use standard cold chisels and a combination of 5lb. sledgehammers and regular claw hammers. Nothing special. Sand stone can be very difficult to cut precisely, you have to kind of work with it.
I find that first scoring with a brick chisel, then laying the stone on flat grass or something soft that can absorb the vibration, usually with a knee or body part on the center of the stone and making swift solid blows works best.
If larger sections of stone need to be removed we'll just use a claw hammer and smack of chunk inch by inch. Its hard to explain, but you definitely need to get a feel for this.
Demo saws are the easiest to use, but you still need to focus on fitting the stone as best you can w/out cutting or else you'll be burning up blades on 2 inch thick stone.
I'd say we probably spend about 2/3rds of our time selecting the next stone than we do actually fitting it.
Nick