quoth Retro Red

1. Hard to be modest when mounting the bike

-- Rubbish !!!

2. Good chance pleats will rub on back tire & spokes

-- Keep your saddle high.

3. Riding very fast could be an "up lifting" experience for your apron

-- Rubbish !!!

4. Squishing your pleats between your legs & the horn of your saddle will create some nasty creases!

-- Depends on quality of the cloth.

Martin,
(kilted full time, on my cycle like anywhere else.
No problems at all.)