We have a 2009 Mandalay 43A DP we bought used in 2015. There have been some minor wear-and-tear issues, but it's been a good rig. It has a full-wall slide, a large kitchen slide and a small master bedroom slide. The two larger slides are hydraulic while the bedroom slide is electric.
We don't have the ability to store it indoors yet, so we make sure it stays well-washed and -waxed.
You will undoubtedly hear from some naysayers, you will for every brand out there, but we're happy with the product.
Pat in Menifee, CA