I cleaned mine this past winter and noticed improved gas milage and acceleration. 10k later and I haven't had any problems. I'd say don't be afraid to hit it hard with the spray and you can even use a q-tip to really get it clean. It's not as fragile as everyone makes it out to be.
I did mine this weekend. While you're in there may as use a throttle body cleaner and get the gunk out of there. It'll run rough for a few minutes then clear up