I was running The Long Arm of the Hutt last night and got to the fight with the bounty hunters. I found it to be incredibly brutal for the players. The Gand uses a blaster rifle set to stun using GGY. Since it's on stun, he had to move to short range. The PCs had taken cover which gave him a final dice pool of GGYPB. Generating a success with that pool is not that difficult.
We were using our own characters in what I believe was probably this adventure. I was playing a Wookiee Maurauder with Brawn 5 and Vibro-Axe for melee combat, and we had a Klatoonian Heavy with Agility 4 and a Heavy Blaster Rifle for ranged combat, and the fight with the Gand started off being really, really bad for us. They kept hitting us with Stun, and no one's Stun Threshold is very high -- a single hit will take most everyone down, or at least take them below half, and then another single hit and they're down.
I managed to get within Engaged range on the Gand with just one point left under my ST. He had already been hurt by the Klatoonian shooting him, so I outright killed him with my Vibro-Axe. At that point, the enemy got scared and switched to using killing damage instead of stun, and we were golden -- no one else could hurt us that badly, and we quickly mopped up. Sure, I got shot a few more times, but between my Soak and my Wound Threshold being way higher than my ST, we were fine.
The lesson here is that doing stun damage is a really quick way to bring down the entire party, because no one has a great deal of ST. So, that means you can capture them easily, interrogate them, and then they can manage to escape.
If you want to give them a chance of really fighting their way through, then don't do stun damage. Even if you manage to take their Wound Threshold down below zero, they're still not dead -- it just takes a little medical skill and some stimpacks, and then they're back up again.
It's actually pretty hard to really kill the players in this game. So, avoiding stun is actually the best way to help ensure that they can fight their way through the enemy.