With a timer you are always setting and starting it and I find this a bother.
Sorry to disagree, but...
With any modern timer you just hit one button.
It turns the enlarger lamp on for the proper time, then turns it off and the timer resets itself to whatever value you had set.
It's actually easier than controlling the enlarger directly because there's only one action required, i.e. starting the timer.
If you control the enlarger directly you must also turn it off at the end of the exposure.
I prefer the little Time-O-Lite because of its compact size, but the larger Gralab works the same way.
- Leigh