We moved into our current house which had a knackered 12 foot round trampoline down the garden 6 years ago. The mat was full of small holes and it had a tattered net and rusty springs. The 3 kids (now 4,6 and 8) loved it despite minimal bounciness, so we decided to buy a new one as a Christmas present this year.
We bought a Telstar Elite 12 foot square trampoline, which fits in the same footprint as the old round one, but with slightly more space due to the corners. It bounces much better, and is a lovely solid bit of kit.
The kids love it and spend a lot of time playing on it every dry day. We do bounce with the kids at times, although I feel very conscious of risks doing so. More often find myself wishing they’d bugger off so I could get some decent bouncing time for myself!