My VX has the Webasto electric "Moonroof" with a dark limo tint and was professionally installed by the PO. I absolutely love it. It looks OEM factory and doesn't leak a single drop even in heavy Washington State down-pours. The replacement headliner looks OEM factory and has never sagged. It has illuminated control buttons; built-in sun-shade slider; built-in wind deflector that raises up upon opening, and the roof will automatically close when the iginition is turned off. I trust it more than I do the cheesy VX electric side-door windows.
Get one, it's awesome. I'm tall, so I already sit really high in the VX with very little headroom and the open roof gives me a feeling of more spaciousness. My only advice is to have it professionally installed by a Automotive Sunroof Shop that sells/installs that specific brand product and ask to see examples of their previous work or customer testimony before purchase.
Lastly, stay away from those cheap pop-top sunroofs that always leak-- if you're gonna cut a hole in your roof, then do it right with an electric moonroof or don't do it at all.