I have a ShowTreka L. I have camped in it many times. (I attached a rail for an awning for the outside of the camping bit...)
All my horses have travelled well in it. Even my old boy who would not load in a back loader, self loaded himself and travelled the best I have ever seen him.
I love the whole range of Treks. I'll either upgrade mine (new ones are uber posh inside ) or simply upgrade the internals of my camping bit.
There was a recall on the axels of Treks around that time - just a note to check it / get it checked. I believe it was simply a bad batch as opposed to anything other than that.