IF it was simply a matter of wasting money buying something to do work you can already do for free, I would go ahead an recommend the driver updater apps -- but it's worse than that. I tried out several last year, knowing that ALL my drivers were up to date. They all said I had obsolete drivers (which was wrong) but some even tried to download and install drivers that were either (1) older than what I had or (2) not the correct driver for my PC.
Like others here, I would advise against using third-party driver update apps.
Besides -- what's all this obsession about updating drivers, anyway? It's not like app updates, where you often get new features and/or fixed bugs. If your hardware works OK now, it's best to leave the drivers alone.