I use an F-Stop timer and I feel that I would be unable to work without one now. To be able to exposed test strips at fixed stops and then select the best one for your main print is a joy. Any burning in or holding back will be fractions of your chosen time. This carries through should you wish to make a larger or smaller version of your original print. All you have to do is establish the main exposure and everything else drops into place.
I started out on this form of printing by using rounded up exposures from Gene Nocon's chart. From there several years later, I invested in a F-Stop timer and never looked back.
To print in any other fashion in my opinion truly leaves you in the darkroom.

Cheers
TEX