As long as you have good dealer support and the funds for a 16k unit I don't see a down side.
Like mentioned their ground speed is not some thing thats a high point but when it comes to tight quarters a competent operator will make up for that pretty quick when it comes to dancing around trees etc.
I've got probably close to 2000 hours on a walker.
I can mow so much faster in close quarters than either of my two hired guys. But they do not have any where close to the experience that I do.
Professionals are people who can do their job when they don't feel like it.
Amateurs are people that can't do their job even when they do feel like it.