I have been playing around with the SSB satellites using a very simple setup. Tonight I was honing my abilities (I won't say skill, that's a long way from reality), and made a contact with WB2SIH. I didn't realize until after I worked him and was trying to work a friend on schedule, that the power output was set below a watt. Bear in mind I was holding an Elk antenna in my hand and probably not dead-on the bird's azimuth or elevation! He did comment I was weak and a little off-frequency, but I'll take it considering all the circumstances.
So the moral of the story is, you do not need a lot of ERP to work the LEO's, FM or SSB.