Great product, but begins to sag at full extension. Still safe, but required re-leveling of the tv with loosening a wing nut and adjusting it either by eye or with a level. Expect full extension to left or right to require adjustment when switching between.  And, yes, we did bolt it to studs correctly it just has some play in the articulating parts - to be expected with anything of this level of motion and able to carry this type of weight