I have experience with all three of these units. My brother has a Lance and it is a fine quality rig with little to be unhappy about. The Frame is sort of iffy in my opinion as is the torsion axles as I like to be able to take the coach off road regularly. Lance's Frame is not a real rugged unit in my observation. As far as comparing a Grand Design to a Lance, they are in two different levels and aren't apples for apples. Lance is a step or two above the Grand Design....at least I'd be comfy say a 2017 Lance and a 2017 Grand Design aren't on the same level. If I was picking one of the two it would depend on if I do mostly hwy driving or mostly boon docking off road. Hwy...Lance, Off road, prolly the Grand Design as it has an I-beam frame and conventional axles....as of 2017 that is.
