I own a 2004 Apex 8. Here's the issues I've had since 2004:
-front vent cover came open twice and broke while driving.
-some wear on the Weblon in spots where the shock cord attachment rivets are not smooth.
-city water fitting/one-way valve failed after just 10 years. :)
-one jack motor failed.
-grey water electric valve switch is intermittent...but works.
-photo paper on sidewall above the counter is coming off at the caulking. Seems as if the caulking caused the glue to dissolve.
-That's all I can think of.
Note: I caused one tiedown attach point to fail when I had a flat rear tire and used the camper jacks to take the weight off the rear of the truck so I could change the tire. I had no other choice at the time. The failure was easily fixed with a piece of angle aluminum and has not been an issue in 8 years and many miles on rough roads.
What I don't have after 10 years of ownership and use:
-leaks
-delamination of Filon
-structural problems of any kind (except the minor one I caused)
-water pump, furnace, HW heater, roof lift, etc failure
-lack of support of Outfitter after the sale.
-regret of buying my Apex 8.