Very happy with it! It's been a great trailer. I should probably make a build thread some day to share more.
I've always been a trailer hater but now that my family wants to go camping more, we decided to try a lot of different options and settled on the opus. It gave us the space of a large ground tent, the amenities of a small RV, and the offroad-ability of a rooftop tent. It's really impressive how much space you get when it folds out - ceilings are around 8' in the middle, with two queen size (ish) mattresses.
Pros: It's pretty well-built and has held up to some decent offroad trails around Utah. With a dry weight around 3K lbs it tows really well with the LC, and decent with my Tacoma.
Plus 2x 20gal water tanks, a full kitchen + fridge, independent coil suspension, quality canvas tent.
There's enough space for storage inside that all I have to carry in the LC is tools, clothes/pillows etc.
Cons: However it is Chinese made and assembled in the US - as with all things made there, they're made as nicely as the company outsourcing to China wants to pay for - so I'd say for the important stuff like the frame, tanks, suspension etc. it's solid, but there are a few smaller things I'm watching - I already replaced the chinese junk tires with some KM3s. A lot of Australian users replace the shocks/springs with new ones, and some of the components like the propane valves, sink drain, water pumps all work "fine" but are cheap and will most likely be replaced. The stock mattresses weren't comfortable at all so we replaced those with Expeds.
Wiring, cabinetry, cushions etc. are all good and the construction of the trailer will hold up a lot better than most cardboard or whatever they're using in cheap American RVs
Finally I wouldn't get one of these for faster-paced overland trips. It takes a good hour+ to set up and tear down so this is more of a "set up and camp for 3 days" kinda deal. For trips where I'm going 100+ miles a day and camping somewhere new, I'm still using a ground tent and will most likely get a RTT soon.