Nice looking barrels with pre-installed spigots and connectors for additional barrels.  No leaks on any of the fittings.  Long lead time for these barrels, but the grey compliments our home and deck colors, so it was worth the wait.
I used the Rain Reserve Fill Kit for dual rain barrels, so I am not linking the barrels via the interconnect fittings, but I'm sure they would work fine.  These aren't sealed barrels, so be sure to install the diverter at the right height in the drain spout so it bypasses the rain barrels once they are full.  With my roof layout, two decent thunderstorms filled the barrels!
Overall, very pleased with the barrels and fill kit.