Straight out of the bag it worked perfectly, I was a bit apprehensive as my boy doesn't like change and I thought he'd be anti being towed but he loved it and the whole thing worked brilliantly. Couldn't recommend enough!! Added is the benefit of using it for skiing [with a harness] which I had never considered but as soon as we're allowed back on the slopes I can see this will be used a lot here too!!
Bought a TowWhee for hilly rides with my five year old. Was a little worried at first in case he lost concentration and crashed, but he took to it no problem. He absolutely loves it and it allows us to go places we couldn't otherwise go. Well worth the money.