Instead of having it centrally located I would push it as far back and to the right as you can, get that cut up flush against the glass like it's coming in from the right outside the tank. I think it would make it look less artificial and more natural. I might also rotate it just a few inches more toward the front of the tank to give it a bit more of a cave feel.
Other than that, I really like that piece of wood.
What a large piece of driftwood. But I won't use it in my tank if I have one.
If the fishes are hiding behind or in the driftwood, what is left for me to enjoy?