Congratulations to the people who raised the money and got this cycle way built, it's a great experience. We live in Combe Down (and the tunnels run under the village).
I cycled with my 2 kids (aged 7 & 8) from Oldfield Park (start) for dinner at the Rose and Crown pub at Midford, a great pub for food. My wife met us at the pub on a lovely summers evening.
It was so nice to be able to cycle on a safe pathway and going under ground was great. The kids enjoyed yelling to get an echo and we all bombed along quite nicely. The valley between the 2 tunnels is a great hidden gem for walks, so closecthe the centre of Bath. It was also lovely to hear music play as we zoomed along - an unexpected delight. We'll be trying the entire length and the pub at Wellow next time.
You do have to be alert for walkers and other users but no more so than anywhere else.