Dreadful Experience. One adult, 2 x 13 year old girls hired 3 battery assisted bikes 2pm to 5.30pm, Sat 26th July. Chain broke on my bike near top of mountain, my fault as used gear when in turbo mode apparently!, I was never advised of this. I had to freewheel down mountain to get replacement bike delivered to me - NO APOLOGY. One of 13 year old's bike ran out of battery after 2.5 hours on steep climb. Our fault as she requested small bike apparently. I had to walk with bike until collected. Was only 52% power at outset, I assumed it would last 3.5 hours of rental. No mention of discount until I asked and reluctantly 15% given. Rude & surly and all our fault.