Accessibility - If the trampoline is going to be used by young children or anyone with mobility issues, a ground level, sunken trampoline will be much easier to both access and exit.
Safety - The easy accessibility and the fact that there isn’t a high drop off make users feel more secure and less anxious about using a trampoline.
It is still advisable to consider a safety net even with an in-ground trampoline, particularly when the primary users are young children.
Aesthetics - A large trampoline can become the dominant feature of a garden. To avoid spoiling the aesthetics, a strategically placed in-ground trampoline will be far less imposing and can easily be disguised when not in use.
A sunken trampoline is a perfect option for a small or landscaped garden.
Privacy – The lower level of an in-ground trampoline means that users aren’t bouncing high enough to look over fences easily, preserving the neighbours’ privacy.