By means of an update, my intial impressions were very positive and they were very responsive and certainly seemed to roll very quickly.
However, l had my first puncture (front) a few weeks back, which to be fair wasnt a problem as l had also purchased the self adhesive patches.
However, finding the hole in the tube proofed rather challenging as you cannot inflate the tube enough really.
But needless to say, it was repaired and refitted to the bike.
Then l had another puncture (rear) a few weeks after the first. Found the hole and applied the self adhesive patch.
As is usually the case after applying a patch, l dunk the semi inflated the tube in a bowl of water to check the self adhesive is holding strong.
Imagine my surprise/horror/shock to see hundreds (only a minor exaggeration) of tiny air bubbles bleeding from the tube?
For reasons that have utterly baffled me, the tube has gone porous?
But l persevered with the remaining one and ordered four more.
Then low and behold, another puncture a short while later. Surprise surprise, the tube revealed the same problem with air bleeding from multiple tiny holes in the tube.
The replacement four TPU tubes arrived and l sold them straight away and have returned to Latex.