Back in the 1960's we transitioned from tent camping, to tent trailers, to hard-sided trailers before discovering and converting to a Hi-Lo in 1967. We tried probably 6 or 8 tent trailers and 4 or 5 of the more popular hard-sided jobs (Phoenix, Shasta, etc.)... and yes, in those days Hi-Lo construction and workmanship quality was very evident in comparison. Back then it was easy to rent a trailer and try it out.
Since then I've always had a Hi-Lo, so I'm honestly not sure how they match up, today, with other brands. My reasons for staying with Hi-Lo boil down to ease of towing... and I'm kind of a gadget guy, and like the innovation of the raising roof section... and frankly, our 1969 Bon Voyage just never wore out!
I've recently passed that same 1969 Hi-Lo to my son so he can use it to camp with his young family, a testimony of Hi-Lo reliability (at least of older models).