I use the 234RC in combination with the Manfrotto 681B monopod and am simply amazed! Of course, keeping a monopod never as calm as it can be a tripod in practice. However, it is a reasonable alternative if you have time not so much space to set or just wants less rumschleppen equipment with them.
The tilt function also guarantees the long focal distance range beautiful edgewise images and you are flexible with such a tripod + head combination when it comes to the location.
For me, a strong buy recommendation and - if used wisely - a great complement to a tripod.