Hi Robert
We bought an Ace Award caravan last year. Ours is a Transtar. We are truly delighted with it. Having said this, we've not owned any other models - so perhaps not a very objective view!
If you were looking for possible criticisms of Ace's, I would say that the drop-in carpets could be better quality - the pile on ours is already looking a bit tired and is pilling slightly.
Also, take a close look at the lighting to see if you like the effect and the positioning - we don't like the round ceiling lights much and would prefer a few more wall lights to give a better coverage of pleasantly soft lighting.
Otherwise, the quality seems very good and we haven't had any cause for complaint. As a measure, we would happily replace ours with another new Ace when the time comes.