Hey. You really want to stay away from these things. They can install weird drivers that can really mess up a system to where it can't boot. It can become very difficult to repair and that's if you really know what you're doing. Honestly.
For drivers, always visit the hardware manufacturer's websites, such as Realtek for most audio/lan, ATI/AMD or NVIDIA for video card, motherboard manufacturers for chipset, Logitech for most mice or keyboards...etc...you get the idea.
I have not tried this particular product but I have never found one yet that was perfect. Sometimes it's the checker program that has the outdated drivers where you have the current ones. Sometimes it has generic and you have the manufacturers version.
If you have something not working, by all means try their driver for that particular item. But I have lost sound and even had to reboot in safe mode and restore from a checkpoint based on driver programs "recommendations".
I've used Driver Max on several occasions with my notebook, and friend's as well, I've had no problem with their service. But I can only speak for myself, and always check out all of your options on these services before doing anything. What may work for me may break your system. But it can be the other way around, too.
I've used DriverMax and find it mostly ok in it's suggestions. My old computer only had a few outdated drivers (mouse and Lan I think) and they updated fine. On my new computer, though, it found quite a few out of date. One was a HD Sound driver that broke the HD Sound panel so a rollback was needed....so I'd say definately be careful and do only 1 update at a time to determine if anything 'breaks' before contuining.