I purchased my Ezytrail off road early this year. Travelled mostly on road, so can't comment on off road yet. It looks to be pretty well built and I'm confident it will be okay on off road tracks. If I was travelling to the cape or similar heavy corrugations then I would have some extra strength welded into the trailer. I've had a few small problems with the trailer all of which they fixed under warranty, but the biggest problem is the canvas tent leaked around the stitching seams in the corners. (My research showed some ezy trail owners had no leaks in the canvas and some did. I'm unlucky or perhaps I've has some issues trying to weather the canvas.) They provided a new tarp to cover the tent and some sealing agent for the canvas. I had to push a bit to get them to do something, but all worked out okay.
Working too a budget, it's value for money. I compared many new similar priced trailers and this still came out better with extra features, bigger tent (good for family of 5), stronger in some places, heavier gauge floor, etc. If I was buying something used, I would still have to spend extra money to fix it or make it better. I've had a welder / boiler maker check the trailer and he said it looked mostly well done. For the amount of times I use it I'm happy with my choice. Yes, I believe they sell allot of trailers and I've seen their workshop. I also see more and more out on the road.
It takes a little longer to set up a trailer tent. I have all my poles marked and it takes me less than 5 min to set up the main tent. Look around if you can and compare to make your decision the right one to suit you. Everyone is different and prefer different systems. Good luck, and happy holidaying..................Cheers...........