How are you configuring BFD timers?

:: For those running BFD on your land-based point-to-point links,
:: I’m interested in hearing about what factors you consider when
:: deciding how to configure your timers and multiplier.

It has been a while since I used BFD, but I remember trying to get
it as close to what I wanted and then fine tuning it over time.
For example, sometimes it would take down the session when I didn't
want it to and I had to turn the knobs a bit. So another thing to
consider is your initial design choice is likely to change over