For what its worth, I have a 1200/12000k Equalizer hitch. I used it with my 07 30ft Timberlodge and Ford Expedition. While I'll admit I had way too much camper for not enough car (weighed in at around 8600lbs), I only had two small occurances of sway that concerned me out of 6k miles of towing, but even then it was nothing too serious and I pulled out of it pretty quick. I have to concur with the previous posts. While I don't know anything about the E2, I think the standard E4 hitch is well worth the money. I've heard horror sories about sway. Fortunately, as a fairly still novice camper (only going on 5yrs), I haven't had any real problems yet due to using this hitch.