Just wanted to post a bit of personal experience which might be helpful to others.
I occasionally took 10mg of cialis before a punt which did provide some benefit, but also left me with a couple of side effects for a few hours afterwards. Never thought about taking the daily dose.
Recently decided to try taking a 5mg dose the day before, and another on the day a good few hours before a meeting. For me, the effect was a lot more noticeable, much better than the single higher dose. So much so I dropped to 2.5mg per day for the next couple of days and the effect was still just as strong. Also, side effects were barely noticeable.
Quite surprised by the different results obtained from the same dosage. Definitely worth trying IMO.