Good friends of ours had Tru Blu and their dust sealing left alot to be desired. Everytime we arrived somewhere after driving on a dirt road they had to wipe down everything in their kitchen, which weh ngetting in late is really annoying.
They had the dust seals all replaced (at their own expense), which did help but didn't solve the problem.
Having said that, it travelled down the Finke Track with a convoy including a Trak Shak, Kimberley, and a custom home made off road trailer and was the only one that came through unscathed (apart from the dust ingression).