Congratulations on your 28DDS purchase. I purchased a 2012 Catalina 28DDS in April of 2011. The RV has been a fantastic experience thus far. But consider this:
I tow with a 2010 Tahoe LT w/ HD Trailering package. 4WD 5.3L V8 . I can tow up to 8200 lbs. I use the Husky Centerline WDH. The Tahoe has no problem pulling the trailer. My GCVW (actual scale weight) was 13,465 lbs, which is below the 14,000 GCWR of the 10 Tahoe. How does it tow? It tows "heavy." By biggest concern is the wheelbase of the Tahoe. Working in public safety, I am always thinking of the "what if's" which of course, no dealer is enthusiastic about discussing. Eventually I'll go to a Silverado 1500/2500. As for sway? The extra $ in the Husky Centerline was worth it. My brother follows me on most of my camping trips and he cannot believe the trailer doesn't sway at ALL. Even on windy days. I towed all over Michigan camping 28 nights last season. I never felt like I was "pushing the safety envelope." My advice is don't speed, maintain a adequate stopping distance (5-8 seconds depending on weather/road conditions). The other downside is the 10mpg the Tahoe gets while towing the 28DDS.
As for the actual coach? The only big complaint I have is Coachmen doesn't sell the coach with a ladder. But FR customer service sent me a schematic on how to do it noting the studs are in the wall to do so. I had a few issues with the laminate separating from an internal slide out wall. I determined this was due to the material being cut "too long." My dealer was very responsive to the issue (Klines RV, Warren, MI) but it took them a couple visits to correct the issue. The DVD player never worked from day 1, but the dealer worked to get me an replacement (different model).
Anytime I have e-mailed customer service from FR (Coachmen) they have been fantastic. Sending me whatever information I asked for.
Sterling Heights, MI
2012 Coachmen Catalina 28DDS
2014 GMC Sierra 1500 SLT
Husky Centerline WDS