I have the Anvil 30, the gas pedal lever on it for a right handed shooter is absolutely money. You can be on the gun with your right hand while handling the head with your left hand. But it makes your tripod essentially only convenient for shooting off of, its hard to glass with an anvil. By far the best shooting head.
I also have the tricer DZ. Its like a panning head with an anvil knock off on top. Dual purpose. I use it for cutting weight to glass and shoot off. The handle is backwards though, so not as seamless as the anvil. To be completely honest I feel like tricer does it on purpose to be different...their tripod legs twist open the opposite of Aziak and RRS, the new DZ head handle goes the other direction. They could be the best for price, but they are just cheaper and less user friendly imo. It works well, but could be better. That's my rant about tricer.