I got the monopod (71", 3-section. not 4-section) and 234RC yesterday. Hands-down, I like the monopod. It is a lot sturdier/better-built than I expected. Including head and camera view-finder height, I can get the VF almost a foot above my eyes. That may come in handy, but not sure. The only complaint is that it has ONLY the 3/8" stud. That limits what I can screw it into. As long as I use the 234RC (or another head), not a problem.
Which brings me to the 234RC tilt-head. Strong enough to hold 80D/150-600, I suppose. That is the last good thing I have to say about it. The Manfrotto quick-release system is cheap plastic crap. The plate itself is decent, sturdy metal. The one-sided, tilt-in/slip-in setup is really not very secure, and made of cheap plastic. It inspires visions of my gear crashing to the ground and splattering. I don't use a neck-strap. My camera strap is the Peak Designs Cuff; I love those things. But, I'm not in the habit of needing a strap when my camera is mounted on something. It is also limiting to have the strap on my wrist while shooting from the tripod. This thing leaves me no choice; I need the strap.
On top of the thin, cheap plastic plate holder, the locking mechanism is a spring mounted detente pin, a spring mounted rotating plastic lever, and a teeny-tiny little brass (?) locking lever that is also spring mounted. THERE IS NOTHING IN THIS SYSTEM TO LOCK THE PLATE MECHANICALLY TO THE HEAD. If all of Manfrotto's plates/heads are like this, I've already purchased my last one.
My last complaint about the 234RC is the coarseness of its adjustment. It does lock down tight; very sturdy. It does loosen to be free-floating; very versatile. If I want it loose/tight enough to move vertically, easily, while shooting a field sport, tough cookies; this head does not do that. If I tighten it enough to not be free-floating, I have to grab the lens/camera with both hands to tilt it up and down. Great for static stuff, but totally useless for shooting stuff that moves around the field.
I took another look at the Surui L-10. At twice the price, it seems like a deal over the 234RC. Looking at the pictures, the tilt tightness mechanism appears to run entirely through the head, not lock on one side like the 234RC. In addition, the gripping surfaces of the tension adjuster appear to have teflon (?) washers on all four contact surfaces. This thing just has to work better than the one I just bought.
For comparison, my tripod is a Vanguard Alta 263 with the SBH-100 Ball head. The 263 can use 1/4" and 3/8" head, though that is a minor issue. The SBH-100 can also be mounted on 1/4" or 3/8". The main differences are the plate itself, and the plate/head connection system. The plate is a bit heavier metal, lets call that a wash. The plate slips into a metal bracket that holds the plate securely. The bracket contains a metal detente pin to keep the plate from sliding out. The SBH system also has a mechanical screw-adjustable side section that securely holds the plate (and my camera/lens) to the head, even if the detente pin fails. I trust this system.
I got off cheap with the 234RC. Now I get to spend the money I should have spent in the first place on a Surui L-10.
The monopod/tilt-head appears to be helping a lot. Hand-holding the 80D/150-600 (especially at 600mm) required shutter speeds in the 1/1000 range. With this monopod, I get good results at 1/200. I don't shoot field sports at 1/200 (usually 1/400-1/640), but I may also shoot a still or two someday!