Yes I run the Billboards on my Kirkham and agree the difference in day to day driving is not that noticeable.
I also have a set if Avons. Obviously the Avons give me a feeling of better handling in corners and they hang on - tread and compound.
The Billboards are difficult to repair if you pick up a nail as rag tyres are not suitable for normal plug type repairs. Tyre shops are very reluctant to touch them. After picking up a nail, I went to two shops before one agreed to touch it. Then only after I convinced him it was a show car tyre.
I also find the Billboards a little noisy on smooth highway surfaces - luckily our roads are rough goat tracks ..
But damnn they look good...
