I bought one of these a few weeks ago to photograph bald eagles in Maryland with my 600mm f/4.� It performs effortlessly with this heavy lens and enabled me to get shots I could net get with my previous head.� It's pricey but worth the money.

While I cannot compare this with the competitions’ offerings, the reviews here and the endorsement by Nat’l Geo photographer Joel Sartore persuaded me. That said, my expectations were exceeded.

The quality is impeccable in all respects! I also had a question about installation on my tripod and Wimberley’s customer support was great.

Highly recommended. You get what you pay for.

I shouldn’t be surprised that this gimbal is incredible because it’s not cheap. But you don’t always get what you pay for - that can’t be said with Wimberley. It’s not only extremely sturdy for the heaviest lens and camera, all movement is highly sensitive to even the slightest tightening of tension. This has really been helpful to me as times I want free movement and others I like a bit of resistance.

I work for a film company that produces nature documentaries, and I also lead photo excursions all over the world. Thus, I have seen and used many gimbal heads, witnessed many tragedies, and have been extremely satisfied with the results from the WH200.
The WH 200 has a lot more to offer than a Benro, Opteka, Neewer, Promaster, etc.Night and Day! 
In short:
Great bearings, this is why the GH200 it costs a lot more than a gimbal head that only uses gel,  grease,  teflon disks, etc 
Extremely smooth and perfectly balanced with many different lenses. We have used GH200 for all our Large teles (1200, 800, 600, with large bodies (D4. D5, teleconverters, strobe lights, and flash extenders) Regardless of weight, we can always balance the head, and lock the arm. Something that almost all other heads are not capable. We cant afford jerky images! 
No issues with extreme temperatures. Unlike some other inexpensive units that gum up in cold temperatures.
No grease or gel that will ooze, as in the case on many inferior models. In one of my trips a client had a cheapo gimbal that oozed a greasy substance than damaged the front element of a 200mm  f2.0 prime. 
Very safe, and no issues with the metal components breaking under load. In my travels I have seen several instances in which low-quality 
gimbals have broke and caused catastrophic damage, including ruptures at the arm and  neck. Many gimbals may look the same, but the quality of the metals are quite different. See pictures of a Nikon 600mm f4  VR lens that went for a swim attached to D5, and SB910 strobe. -In this case the poor quality lower plate broke from the arm- 
Also take a look at the letter from Nikon...
No problems with stripped bolts, which is a common malady that caused many inexpensive units to no longer lock.
Do not compromise your expensive gear, by relaying in a mediocre preforming and sometimes dangerous knock-off of a tru gimbal head.

Top quality, but really heavy

I do a fair amount of wildlife photography, and have always wanted to buy the Wimberley WH-200 gimbal head, but have always stalled secondary to its price. The question was essentially whether it was worth all the money I would spend. One week after purchasing this product my answer was a resounding yes! This gimbal head works very smoothly and is a pleasure to use. The number of sharp images I am acquiring is upward of 90%. This gimbal head has dramatically improved my photography, and would highly recommend it to anyone interested in wildlife or sports photography. I dont write many reviews, but this is genuinely a product worthy of praise.

Just the tripod head I was hoping for.

I replaced a Wimberley Sidekick with this full head unit. It always concerned me that my 500mm f4 VR lens had to be mounted sideways on the Sidekick. The Sidekick had an advantage of allowing me to still have the ball head available. This unit is smooth, oh so smooth in it's movements. The lens mounts sitting down on top of it.

Great piece of equipment. Very solid and easy to set up and use. I mount a 400mm f2.8 on this rig and the lens is virtually weightless.

I have only used it a short time but I can see that I will use it a lot, now that I see how well it works. Even better than I expected.