My experience so far (as stated in another thread) was in a High RES last night with my wingwoman (neither of us own Horizons) and if I'm being brutally honest, I'd say it was a tad too easy, in that, we're both utter garbage with medium sized ships (Cobra, DBS) yet were taking out high level Pythons, Dropships, Clippers without a great deal of trouble, albeit with occasional assistance from the security guys.
I kept saying to her, "We're probably going to die here or at least be forced to run" but... it never really got too hairy except for the first Clipper we faced which was firing weird stuff I'm not sure I'd ever encountered before (and we tend to stick our faces right in there to see the pretty lights).
One Dangerous Dropship we fought didn't fire a single shot throughout the whole fight as far as I could tell. Oh! And I fought a Python on my own which was in a wing (it was invisible to my friend

) and the biggest problem was how long it took me to kill it with my wee (yet manly) guns. I should have been battered as I boosted into it a couple of times and knocked my own shields off.
It was great fun overall but in the back of my mind I feel, we probably shouldn't be able to leave a High RES after 20 minutes with close to 1 million credits and our ships pretty much intact, considering, as I said, we are UTTER garbage at flying. Especially her with her wee fingers. She can't use the thrusters at all. She doesn't even have chaff. Tsssk.