I moved from a diesel pusher back to my 5th wheel roots this year. I sought out an Open Range and settled on a lightly used 2019 36 footer. They had an earlier problem with their cable slide system but that was resolved some time ago. I have friends who are on their 2nd unit, and some other friends are on their 1st unit, no problems with any of them. As for me, I replaced a very poorly installed grey tank valve cable, and I had a problem with the Atwood (now Dometic) water heater that I resolved with a new thermostat and E.C.O.
Positives include the windows, slides, layout, J.T. Strongarms, Gel coat cap with no signs of chalking, and quiet roof A/C. Negatives include a really crappy furnace location which will require some carpentry when it ever needs attention, a lack of basement storage (spoiled by the bus I guess), and a very slight soft spot on the floor. It's subtle, but it's there.
Overall, they seem a bit better built than other units in the same price range. OTOH, maybe my friends just got very good units. It often seems like there's every bit as much quality variability among trailers from the same manufacturer as there is among different manufacturers. Whatever you find or choose, you'll want to do as thorough an inspection as you possibly can.
2022 RAM 3500 Cummins SRW long bed, 2019 Open Range 319 RLS, Reese Goosebox, disk brakes