Cooking times vs thermometers (spoiler alert: thermometer wins)

I am walking away from cooking times for my recipes.  You may notice that some of them say "cook to temperature" and then include a disclaimer of "about xx minutes".  I found that much of what I was cooking was either overcooked or undercooked when I went with the recipe recommendations.  I bought a really good oven thermometer which looks a lot like this one:

and I plug it in every time I cook meat.  Set to temp, alarm goes off when I get there, perfectly cooked meat every time so long as I know what temperature I like it.