We bought a Northstar. Build quality is outstanding and solid. There were a few minor things/annoyances that were remedied for us. I'm sure that is the case with all RVs.
We looked at ALL other major makes and picked Northstar for many, many reasons. We much preferred the interior "feel" of Northstars over AF and others. We were not really impressed by the so called "quality" of EC and Adventurer. If we hadn't gotten our particular Northstar (needed room for 4 sleeping, ability to add lots of solar, "mod-ability",etc.) it would have been a Northern Lite for sure!
Do a search here, you will find much more info.