I bought this unit specifically for it's 24VDC supply and for the DIN-rail mount. Have been using it for a couple of weeks now and have had no problem with its functionallity running a USB to serial converters on it.
The DIN-rail mount on the other hand is a complete joke. I mean it's a nice metal clip which could've worked fine if it wasn't for the fact that the fit to the rail is very (very!) "sloppy" - not at ALL what I'm used to for industrial DIN-rail stuff. Modification needed....
And since the DIN-rail mount is one of the key features of this it really does bring it down.