I own a 2003 LD. It has some problems and requires maintenance like any other 14 year old vehicle. I would buy one again (and probably will somewhere down the line).
Two things that, for me, differentiate them from the herd:
(1) a less is more, KISS attitude. Shine and polish sells most RV's but anyone who has owned an RV for a while knows that shine and polish wear off. That overloaded 31' C with 2 slides sure does look spacious when you're sitting in the showroom. A few hundred miles down the road a a trip to the weigh station and you realize that all that space came with a tradeoff.
(2) Too much of the RV industry has a very real quality and workmanship problem. LD does much better than most of the rest. That matters in the long run.
They do have more than their fair share of quirks, but too much of what the rest of the industry produces is borderline junk.